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Finding the Fourth Proportional to 508,438.41, 762,662.13 and 129,359.61

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Solution

The fourth proportional to 508,438.41, 762,662.13 and 129,359.61 is: 194,040.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,438.41 : 762,662.13 = 129,359.61 : x
  2. Step 2: Convert to fraction form
    508,438.41/762,662.13 = 129,359.61/x
  3. Step 3: Cross multiply
    508,438.41x = 762,662.13 × 129,359.61
  4. Step 4: Simplify right side
    508,438.41x = 98,657,675,698.57
  5. Step 5: Solve for x
    x = 98,657,675,698.57/508,438.41
  6. Step 6: Final answer
    x = 194,040.56

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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.