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Finding the Fourth Proportional to 508,770.60, 763,155.90 and 129,690.60

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Solution

The fourth proportional to 508,770.60, 763,155.90 and 129,690.60 is: 194,535.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,770.60 : 763,155.90 = 129,690.60 : x
  2. Step 2: Convert to fraction form
    508,770.60/763,155.90 = 129,690.60/x
  3. Step 3: Cross multiply
    508,770.60x = 763,155.90 × 129,690.60
  4. Step 4: Simplify right side
    508,770.60x = 98,974,146,564.54
  5. Step 5: Solve for x
    x = 98,974,146,564.54/508,770.60
  6. Step 6: Final answer
    x = 194,535.90

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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.