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Finding the Fourth Proportional to 399,332.80, 551,080.41 and 218,046.29

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Solution

The fourth proportional to 399,332.80, 551,080.41 and 218,046.29 is: 300,904.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,332.80 : 551,080.41 = 218,046.29 : x
  2. Step 2: Convert to fraction form
    399,332.80/551,080.41 = 218,046.29/x
  3. Step 3: Cross multiply
    399,332.80x = 551,080.41 × 218,046.29
  4. Step 4: Simplify right side
    399,332.80x = 120,161,038,892.18
  5. Step 5: Solve for x
    x = 120,161,038,892.18/399,332.80
  6. Step 6: Final answer
    x = 300,904.51

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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.