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Finding the Fourth Proportional to 658.93, 989.06 and 330.10

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Solution

The fourth proportional to 658.93, 989.06 and 330.10 is: 495.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.93 : 989.06 = 330.10 : x
  2. Step 2: Convert to fraction form
    658.93/989.06 = 330.10/x
  3. Step 3: Cross multiply
    658.93x = 989.06 × 330.10
  4. Step 4: Simplify right side
    658.93x = 326,487.47
  5. Step 5: Solve for x
    x = 326,487.47/658.93
  6. Step 6: Final answer
    x = 495.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.