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Finding the Fourth Proportional to 410,326.20, 615,546.90 and 129,814.20

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Solution

The fourth proportional to 410,326.20, 615,546.90 and 129,814.20 is: 194,739.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    410,326.20 : 615,546.90 = 129,814.20 : x
  2. Step 2: Convert to fraction form
    410,326.20/615,546.90 = 129,814.20/x
  3. Step 3: Cross multiply
    410,326.20x = 615,546.90 × 129,814.20
  4. Step 4: Simplify right side
    410,326.20x = 79,906,728,385.98
  5. Step 5: Solve for x
    x = 79,906,728,385.98/410,326.20
  6. Step 6: Final answer
    x = 194,739.52

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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.