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Finding the Fourth Proportional to 410,595.20, 615,892.80 and 391,349.60

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Solution

The fourth proportional to 410,595.20, 615,892.80 and 391,349.60 is: 587,024.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    410,595.20 : 615,892.80 = 391,349.60 : x
  2. Step 2: Convert to fraction form
    410,595.20/615,892.80 = 391,349.60/x
  3. Step 3: Cross multiply
    410,595.20x = 615,892.80 × 391,349.60
  4. Step 4: Simplify right side
    410,595.20x = 241,029,400,922.88
  5. Step 5: Solve for x
    x = 241,029,400,922.88/410,595.20
  6. Step 6: Final answer
    x = 587,024.40

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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.