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Finding the Fourth Proportional to 425.90, 637.73 and 279.18

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Solution

The fourth proportional to 425.90, 637.73 and 279.18 is: 418.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    425.90 : 637.73 = 279.18 : x
  2. Step 2: Convert to fraction form
    425.90/637.73 = 279.18/x
  3. Step 3: Cross multiply
    425.90x = 637.73 × 279.18
  4. Step 4: Simplify right side
    425.90x = 178,042.46
  5. Step 5: Solve for x
    x = 178,042.46/425.90
  6. Step 6: Final answer
    x = 418.04

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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.