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Finding the Fourth Proportional to 508,418.22, 762,631.68 and 129,339.30

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Solution

The fourth proportional to 508,418.22, 762,631.68 and 129,339.30 is: 194,010.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,418.22 : 762,631.68 = 129,339.30 : x
  2. Step 2: Convert to fraction form
    508,418.22/762,631.68 = 129,339.30/x
  3. Step 3: Cross multiply
    508,418.22x = 762,631.68 × 129,339.30
  4. Step 4: Simplify right side
    508,418.22x = 98,638,247,649.02
  5. Step 5: Solve for x
    x = 98,638,247,649.02/508,418.22
  6. Step 6: Final answer
    x = 194,010.06

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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.