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Finding the Fourth Proportional to 638,863,239.30, 958,294,858.95 and 638,863,239.30

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Solution

The fourth proportional to 638,863,239.30, 958,294,858.95 and 638,863,239.30 is: 958,294,858.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,863,239.30 : 958,294,858.95 = 638,863,239.30 : x
  2. Step 2: Convert to fraction form
    638,863,239.30/958,294,858.95 = 638,863,239.30/x
  3. Step 3: Cross multiply
    638,863,239.30x = 958,294,858.95 × 638,863,239.30
  4. Step 4: Simplify right side
    638,863,239.30x = 612,219,357,793,333,632
  5. Step 5: Solve for x
    x = 612,219,357,793,333,632/638,863,239.30
  6. Step 6: Final answer
    x = 958,294,858.95

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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.