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Finding the Fourth Proportional to 398,658.63, 597,397.22 and 328,082.79

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Solution

The fourth proportional to 398,658.63, 597,397.22 and 328,082.79 is: 491,638.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,658.63 : 597,397.22 = 328,082.79 : x
  2. Step 2: Convert to fraction form
    398,658.63/597,397.22 = 328,082.79/x
  3. Step 3: Cross multiply
    398,658.63x = 597,397.22 × 328,082.79
  4. Step 4: Simplify right side
    398,658.63x = 195,995,746,675.84
  5. Step 5: Solve for x
    x = 195,995,746,675.84/398,658.63
  6. Step 6: Final answer
    x = 491,638.04

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.