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Finding the Fourth Proportional to 298,081.20, 447,132.60 and 87,740.40

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Solution

The fourth proportional to 298,081.20, 447,132.60 and 87,740.40 is: 131,613.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,081.20 : 447,132.60 = 87,740.40 : x
  2. Step 2: Convert to fraction form
    298,081.20/447,132.60 = 87,740.40/x
  3. Step 3: Cross multiply
    298,081.20x = 447,132.60 × 87,740.40
  4. Step 4: Simplify right side
    298,081.20x = 39,231,593,177.04
  5. Step 5: Solve for x
    x = 39,231,593,177.04/298,081.20
  6. Step 6: Final answer
    x = 131,613.78

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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.