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Finding the Fourth Proportional to 410,342.20, 615,570.90 and 129,830.20

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Solution

The fourth proportional to 410,342.20, 615,570.90 and 129,830.20 is: 194,763.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    410,342.20 : 615,570.90 = 129,830.20 : x
  2. Step 2: Convert to fraction form
    410,342.20/615,570.90 = 129,830.20/x
  3. Step 3: Cross multiply
    410,342.20x = 615,570.90 × 129,830.20
  4. Step 4: Simplify right side
    410,342.20x = 79,919,693,061.18
  5. Step 5: Solve for x
    x = 79,919,693,061.18/410,342.20
  6. Step 6: Final answer
    x = 194,763.52

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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.