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Finding the Fourth Proportional to 398,862.70, 550,434.04 and 217,575.44

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Solution

The fourth proportional to 398,862.70, 550,434.04 and 217,575.44 is: 300,256.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,862.70 : 550,434.04 = 217,575.44 : x
  2. Step 2: Convert to fraction form
    398,862.70/550,434.04 = 217,575.44/x
  3. Step 3: Cross multiply
    398,862.70x = 550,434.04 × 217,575.44
  4. Step 4: Simplify right side
    398,862.70x = 119,760,925,691.81
  5. Step 5: Solve for x
    x = 119,760,925,691.81/398,862.70
  6. Step 6: Final answer
    x = 300,256.02

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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.