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Finding the Fourth Proportional to 508,506.60, 762,759.90 and 129,426.60

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Solution

The fourth proportional to 508,506.60, 762,759.90 and 129,426.60 is: 194,139.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,506.60 : 762,759.90 = 129,426.60 : x
  2. Step 2: Convert to fraction form
    508,506.60/762,759.90 = 129,426.60/x
  3. Step 3: Cross multiply
    508,506.60x = 762,759.90 × 129,426.60
  4. Step 4: Simplify right side
    508,506.60x = 98,721,420,473.34
  5. Step 5: Solve for x
    x = 98,721,420,473.34/508,506.60
  6. Step 6: Final answer
    x = 194,139.90

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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.