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Finding the Fourth Proportional to 658.94, 909.38 and 397.00

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Solution

The fourth proportional to 658.94, 909.38 and 397.00 is: 547.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.94 : 909.38 = 397.00 : x
  2. Step 2: Convert to fraction form
    658.94/909.38 = 397.00/x
  3. Step 3: Cross multiply
    658.94x = 909.38 × 397.00
  4. Step 4: Simplify right side
    658.94x = 361,017.33
  5. Step 5: Solve for x
    x = 361,017.33/658.94
  6. Step 6: Final answer
    x = 547.88

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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.