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Finding the Fourth Proportional to 438,414.30, 658,312.65 and 251,790.30

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Solution

The fourth proportional to 438,414.30, 658,312.65 and 251,790.30 is: 378,082.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,414.30 : 658,312.65 = 251,790.30 : x
  2. Step 2: Convert to fraction form
    438,414.30/658,312.65 = 251,790.30/x
  3. Step 3: Cross multiply
    438,414.30x = 658,312.65 × 251,790.30
  4. Step 4: Simplify right side
    438,414.30x = 165,756,739,637.30
  5. Step 5: Solve for x
    x = 165,756,739,637.30/438,414.30
  6. Step 6: Final answer
    x = 378,082.42

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1.5x scale

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.