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Finding the Fourth Proportional to 508,419.72, 762,633.93 and 129,340.80

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Solution

The fourth proportional to 508,419.72, 762,633.93 and 129,340.80 is: 194,012.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,419.72 : 762,633.93 = 129,340.80 : x
  2. Step 2: Convert to fraction form
    508,419.72/762,633.93 = 129,340.80/x
  3. Step 3: Cross multiply
    508,419.72x = 762,633.93 × 129,340.80
  4. Step 4: Simplify right side
    508,419.72x = 98,639,682,613.34
  5. Step 5: Solve for x
    x = 98,639,682,613.34/508,419.72
  6. Step 6: Final answer
    x = 194,012.31

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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.