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Finding the Fourth Proportional to 391,042.10, 587,000.55 and 302,687.30

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Solution

The fourth proportional to 391,042.10, 587,000.55 and 302,687.30 is: 454,369.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,042.10 : 587,000.55 = 302,687.30 : x
  2. Step 2: Convert to fraction form
    391,042.10/587,000.55 = 302,687.30/x
  3. Step 3: Cross multiply
    391,042.10x = 587,000.55 × 302,687.30
  4. Step 4: Simplify right side
    391,042.10x = 177,677,611,578.02
  5. Step 5: Solve for x
    x = 177,677,611,578.02/391,042.10
  6. Step 6: Final answer
    x = 454,369.52

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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.