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Finding the Fourth Proportional to 278,987.60, 418,481.40 and 89,447.60

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Solution

The fourth proportional to 278,987.60, 418,481.40 and 89,447.60 is: 134,171.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,987.60 : 418,481.40 = 89,447.60 : x
  2. Step 2: Convert to fraction form
    278,987.60/418,481.40 = 89,447.60/x
  3. Step 3: Cross multiply
    278,987.60x = 418,481.40 × 89,447.60
  4. Step 4: Simplify right side
    278,987.60x = 37,432,156,874.64
  5. Step 5: Solve for x
    x = 37,432,156,874.64/278,987.60
  6. Step 6: Final answer
    x = 134,171.40

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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.