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Finding the Fourth Proportional to 691,638.75, 955,248.80 and 464,890.59

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Solution

The fourth proportional to 691,638.75, 955,248.80 and 464,890.59 is: 642,078.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,638.75 : 955,248.80 = 464,890.59 : x
  2. Step 2: Convert to fraction form
    691,638.75/955,248.80 = 464,890.59/x
  3. Step 3: Cross multiply
    691,638.75x = 955,248.80 × 464,890.59
  4. Step 4: Simplify right side
    691,638.75x = 444,086,175,904.34
  5. Step 5: Solve for x
    x = 444,086,175,904.34/691,638.75
  6. Step 6: Final answer
    x = 642,078.22

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Half scale
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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.