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Finding the Fourth Proportional to 298,187.38, 447,378.27 and 140,431.78

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Solution

The fourth proportional to 298,187.38, 447,378.27 and 140,431.78 is: 210,693.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,187.38 : 447,378.27 = 140,431.78 : x
  2. Step 2: Convert to fraction form
    298,187.38/447,378.27 = 140,431.78/x
  3. Step 3: Cross multiply
    298,187.38x = 447,378.27 × 140,431.78
  4. Step 4: Simplify right side
    298,187.38x = 62,826,126,789.42
  5. Step 5: Solve for x
    x = 62,826,126,789.42/298,187.38
  6. Step 6: Final answer
    x = 210,693.45

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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.