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Finding the Fourth Proportional to 658.05, 907.63 and 422

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Solution

The fourth proportional to 658.05, 907.63 and 422 is: 582.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.05 : 907.63 = 422 : x
  2. Step 2: Convert to fraction form
    658.05/907.63 = 422/x
  3. Step 3: Cross multiply
    658.05x = 907.63 × 422
  4. Step 4: Simplify right side
    658.05x = 383,019.86
  5. Step 5: Solve for x
    x = 383,019.86/658.05
  6. Step 6: Final answer
    x = 582.05

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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.