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Finding the Fourth Proportional to 658.47, 908.51 and 409.80

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Solution

The fourth proportional to 658.47, 908.51 and 409.80 is: 565.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.47 : 908.51 = 409.80 : x
  2. Step 2: Convert to fraction form
    658.47/908.51 = 409.80/x
  3. Step 3: Cross multiply
    658.47x = 908.51 × 409.80
  4. Step 4: Simplify right side
    658.47x = 372,307.40
  5. Step 5: Solve for x
    x = 372,307.40/658.47
  6. Step 6: Final answer
    x = 565.41

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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.