Home / 498,721.97-688,197.28-280,921.11

Finding the Fourth Proportional to 498,721.97, 688,197.28 and 280,921.11

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Solution

The fourth proportional to 498,721.97, 688,197.28 and 280,921.11 is: 387,649.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    498,721.97 : 688,197.28 = 280,921.11 : x
  2. Step 2: Convert to fraction form
    498,721.97/688,197.28 = 280,921.11/x
  3. Step 3: Cross multiply
    498,721.97x = 688,197.28 × 280,921.11
  4. Step 4: Simplify right side
    498,721.97x = 193,329,147,548.18
  5. Step 5: Solve for x
    x = 193,329,147,548.18/498,721.97
  6. Step 6: Final answer
    x = 387,649.15

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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.