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Finding the Fourth Proportional to 508,417.72, 762,630.92 and 129,338.80

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Solution

The fourth proportional to 508,417.72, 762,630.92 and 129,338.80 is: 194,009.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,417.72 : 762,630.92 = 129,338.80 : x
  2. Step 2: Convert to fraction form
    508,417.72/762,630.92 = 129,338.80/x
  3. Step 3: Cross multiply
    508,417.72x = 762,630.92 × 129,338.80
  4. Step 4: Simplify right side
    508,417.72x = 98,637,768,035.70
  5. Step 5: Solve for x
    x = 98,637,768,035.70/508,417.72
  6. Step 6: Final answer
    x = 194,009.30

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1.5x scale

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.