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Finding the Fourth Proportional to 399,543, 551,369.34 and 229,773.48

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Solution

The fourth proportional to 399,543, 551,369.34 and 229,773.48 is: 317,087.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,543 : 551,369.34 = 229,773.48 : x
  2. Step 2: Convert to fraction form
    399,543/551,369.34 = 229,773.48/x
  3. Step 3: Cross multiply
    399,543x = 551,369.34 × 229,773.48
  4. Step 4: Simplify right side
    399,543x = 126,690,052,017.10
  5. Step 5: Solve for x
    x = 126,690,052,017.10/399,543
  6. Step 6: Final answer
    x = 317,087.40

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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.