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Finding the Fourth Proportional to 399,332.84, 551,081.98 and 218,046.03

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Solution

The fourth proportional to 399,332.84, 551,081.98 and 218,046.03 is: 300,904.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,332.84 : 551,081.98 = 218,046.03 : x
  2. Step 2: Convert to fraction form
    399,332.84/551,081.98 = 218,046.03/x
  3. Step 3: Cross multiply
    399,332.84x = 551,081.98 × 218,046.03
  4. Step 4: Simplify right side
    399,332.84x = 120,161,236,149.54
  5. Step 5: Solve for x
    x = 120,161,236,149.54/399,332.84
  6. Step 6: Final answer
    x = 300,904.97

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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.