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Finding the Fourth Proportional to 410,612.20, 615,918.30 and 391,366.60

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Solution

The fourth proportional to 410,612.20, 615,918.30 and 391,366.60 is: 587,049.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    410,612.20 : 615,918.30 = 391,366.60 : x
  2. Step 2: Convert to fraction form
    410,612.20/615,918.30 = 391,366.60/x
  3. Step 3: Cross multiply
    410,612.20x = 615,918.30 × 391,366.60
  4. Step 4: Simplify right side
    410,612.20x = 241,049,850,948.78
  5. Step 5: Solve for x
    x = 241,049,850,948.78/410,612.20
  6. Step 6: Final answer
    x = 587,049.90

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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.