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Finding the Fourth Proportional to 399,520.56, 551,354.76 and 229,754.64

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Solution

The fourth proportional to 399,520.56, 551,354.76 and 229,754.64 is: 317,070.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,520.56 : 551,354.76 = 229,754.64 : x
  2. Step 2: Convert to fraction form
    399,520.56/551,354.76 = 229,754.64/x
  3. Step 3: Cross multiply
    399,520.56x = 551,354.76 × 229,754.64
  4. Step 4: Simplify right side
    399,520.56x = 126,676,314,396.09
  5. Step 5: Solve for x
    x = 126,676,314,396.09/399,520.56
  6. Step 6: Final answer
    x = 317,070.83

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.