Home / 410,299.20-615,387.24-129,780

Finding the Fourth Proportional to 410,299.20, 615,387.24 and 129,780

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Solution

The fourth proportional to 410,299.20, 615,387.24 and 129,780 is: 194,650.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    410,299.20 : 615,387.24 = 129,780 : x
  2. Step 2: Convert to fraction form
    410,299.20/615,387.24 = 129,780/x
  3. Step 3: Cross multiply
    410,299.20x = 615,387.24 × 129,780
  4. Step 4: Simplify right side
    410,299.20x = 79,864,956,007.20
  5. Step 5: Solve for x
    x = 79,864,956,007.20/410,299.20
  6. Step 6: Final answer
    x = 194,650.53

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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.