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Finding the Fourth Proportional to 638,863,224.30, 958,294,836.45 and 638,863,224.30

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Solution

The fourth proportional to 638,863,224.30, 958,294,836.45 and 638,863,224.30 is: 958,294,836.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,863,224.30 : 958,294,836.45 = 638,863,224.30 : x
  2. Step 2: Convert to fraction form
    638,863,224.30/958,294,836.45 = 638,863,224.30/x
  3. Step 3: Cross multiply
    638,863,224.30x = 958,294,836.45 × 638,863,224.30
  4. Step 4: Simplify right side
    638,863,224.30x = 612,219,329,044,488,192
  5. Step 5: Solve for x
    x = 612,219,329,044,488,192/638,863,224.30
  6. Step 6: Final answer
    x = 958,294,836.45

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.