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Finding the Fourth Proportional to 298,286.66, 447,211.28 and 140,429

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Solution

The fourth proportional to 298,286.66, 447,211.28 and 140,429 is: 210,540.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,286.66 : 447,211.28 = 140,429 : x
  2. Step 2: Convert to fraction form
    298,286.66/447,211.28 = 140,429/x
  3. Step 3: Cross multiply
    298,286.66x = 447,211.28 × 140,429
  4. Step 4: Simplify right side
    298,286.66x = 62,801,432,839.12
  5. Step 5: Solve for x
    x = 62,801,432,839.12/298,286.66
  6. Step 6: Final answer
    x = 210,540.53

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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.