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Finding the Fourth Proportional to 508,408.89, 762,610.02 and 129,326.37

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Solution

The fourth proportional to 508,408.89, 762,610.02 and 129,326.37 is: 193,988.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,408.89 : 762,610.02 = 129,326.37 : x
  2. Step 2: Convert to fraction form
    508,408.89/762,610.02 = 129,326.37/x
  3. Step 3: Cross multiply
    508,408.89x = 762,610.02 × 129,326.37
  4. Step 4: Simplify right side
    508,408.89x = 98,625,585,612.23
  5. Step 5: Solve for x
    x = 98,625,585,612.23/508,408.89
  6. Step 6: Final answer
    x = 193,988.71

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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.