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Finding the Fourth Proportional to 508,410.90, 762,620.72 and 129,331.96

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Solution

The fourth proportional to 508,410.90, 762,620.72 and 129,331.96 is: 193,999.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,410.90 : 762,620.72 = 129,331.96 : x
  2. Step 2: Convert to fraction form
    508,410.90/762,620.72 = 129,331.96/x
  3. Step 3: Cross multiply
    508,410.90x = 762,620.72 × 129,331.96
  4. Step 4: Simplify right side
    508,410.90x = 98,631,229,901.00
  5. Step 5: Solve for x
    x = 98,631,229,901.00/508,410.90
  6. Step 6: Final answer
    x = 193,999.05

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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.