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Finding the Fourth Proportional to 508,511.10, 762,766.65 and 129,431.10

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Solution

The fourth proportional to 508,511.10, 762,766.65 and 129,431.10 is: 194,146.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,511.10 : 762,766.65 = 129,431.10 : x
  2. Step 2: Convert to fraction form
    508,511.10/762,766.65 = 129,431.10/x
  3. Step 3: Cross multiply
    508,511.10x = 762,766.65 × 129,431.10
  4. Step 4: Simplify right side
    508,511.10x = 98,725,726,552.82
  5. Step 5: Solve for x
    x = 98,725,726,552.82/508,511.10
  6. Step 6: Final answer
    x = 194,146.65

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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.