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Finding the Fourth Proportional to 398,785.28, 550,370.97 and 226,729.17

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Solution

The fourth proportional to 398,785.28, 550,370.97 and 226,729.17 is: 312,913.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,785.28 : 550,370.97 = 226,729.17 : x
  2. Step 2: Convert to fraction form
    398,785.28/550,370.97 = 226,729.17/x
  3. Step 3: Cross multiply
    398,785.28x = 550,370.97 × 226,729.17
  4. Step 4: Simplify right side
    398,785.28x = 124,785,153,220.20
  5. Step 5: Solve for x
    x = 124,785,153,220.20/398,785.28
  6. Step 6: Final answer
    x = 312,913.14

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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.