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Finding the Fourth Proportional to 658.88, 909.64 and 422.96

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Solution

The fourth proportional to 658.88, 909.64 and 422.96 is: 583.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.88 : 909.64 = 422.96 : x
  2. Step 2: Convert to fraction form
    658.88/909.64 = 422.96/x
  3. Step 3: Cross multiply
    658.88x = 909.64 × 422.96
  4. Step 4: Simplify right side
    658.88x = 384,741.33
  5. Step 5: Solve for x
    x = 384,741.33/658.88
  6. Step 6: Final answer
    x = 583.93

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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.