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Finding the Fourth Proportional to 399,366.84, 551,127.24 and 218,080.20

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Solution

The fourth proportional to 399,366.84, 551,127.24 and 218,080.20 is: 300,951.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,366.84 : 551,127.24 = 218,080.20 : x
  2. Step 2: Convert to fraction form
    399,366.84/551,127.24 = 218,080.20/x
  3. Step 3: Cross multiply
    399,366.84x = 551,127.24 × 218,080.20
  4. Step 4: Simplify right side
    399,366.84x = 120,189,938,724.65
  5. Step 5: Solve for x
    x = 120,189,938,724.65/399,366.84
  6. Step 6: Final answer
    x = 300,951.22

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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.