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Finding the Fourth Proportional to 410,606.20, 615,909.30 and 391,360.60

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Solution

The fourth proportional to 410,606.20, 615,909.30 and 391,360.60 is: 587,040.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    410,606.20 : 615,909.30 = 391,360.60 : x
  2. Step 2: Convert to fraction form
    410,606.20/615,909.30 = 391,360.60/x
  3. Step 3: Cross multiply
    410,606.20x = 615,909.30 × 391,360.60
  4. Step 4: Simplify right side
    410,606.20x = 241,042,633,193.58
  5. Step 5: Solve for x
    x = 241,042,633,193.58/410,606.20
  6. Step 6: Final answer
    x = 587,040.90

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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.