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Finding the Fourth Proportional to 658.55, 908.90 and 406.62

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Solution

The fourth proportional to 658.55, 908.90 and 406.62 is: 561.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.55 : 908.90 = 406.62 : x
  2. Step 2: Convert to fraction form
    658.55/908.90 = 406.62/x
  3. Step 3: Cross multiply
    658.55x = 908.90 × 406.62
  4. Step 4: Simplify right side
    658.55x = 369,577.93
  5. Step 5: Solve for x
    x = 369,577.93/658.55
  6. Step 6: Final answer
    x = 561.20

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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.