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Finding the Fourth Proportional to 658, 908.05 and 425.53

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Solution

The fourth proportional to 658, 908.05 and 425.53 is: 587.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    658 : 908.05 = 425.53 : x
  2. Step 2: Convert to fraction form
    658/908.05 = 425.53/x
  3. Step 3: Cross multiply
    658x = 908.05 × 425.53
  4. Step 4: Simplify right side
    658x = 386,402.52
  5. Step 5: Solve for x
    x = 386,402.52/658
  6. Step 6: Final answer
    x = 587.24

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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.