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Finding the Fourth Proportional to 398,713.68, 550,220.52 and 217,425.04

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Solution

The fourth proportional to 398,713.68, 550,220.52 and 217,425.04 is: 300,044.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,713.68 : 550,220.52 = 217,425.04 : x
  2. Step 2: Convert to fraction form
    398,713.68/550,220.52 = 217,425.04/x
  3. Step 3: Cross multiply
    398,713.68x = 550,220.52 × 217,425.04
  4. Step 4: Simplify right side
    398,713.68x = 119,631,718,569.82
  5. Step 5: Solve for x
    x = 119,631,718,569.82/398,713.68
  6. Step 6: Final answer
    x = 300,044.18

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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.