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Finding the Fourth Proportional to 399,589.88, 551,434.03 and 220,741.88

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Solution

The fourth proportional to 399,589.88, 551,434.03 and 220,741.88 is: 304,623.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,589.88 : 551,434.03 = 220,741.88 : x
  2. Step 2: Convert to fraction form
    399,589.88/551,434.03 = 220,741.88/x
  3. Step 3: Cross multiply
    399,589.88x = 551,434.03 × 220,741.88
  4. Step 4: Simplify right side
    399,589.88x = 121,724,581,169.15
  5. Step 5: Solve for x
    x = 121,724,581,169.15/399,589.88
  6. Step 6: Final answer
    x = 304,623.79

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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.