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Finding the Fourth Proportional to 658.82, 909.06 and 393.35

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Solution

The fourth proportional to 658.82, 909.06 and 393.35 is: 542.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.82 : 909.06 = 393.35 : x
  2. Step 2: Convert to fraction form
    658.82/909.06 = 393.35/x
  3. Step 3: Cross multiply
    658.82x = 909.06 × 393.35
  4. Step 4: Simplify right side
    658.82x = 357,574.21
  5. Step 5: Solve for x
    x = 357,574.21/658.82
  6. Step 6: Final answer
    x = 542.75

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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.