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Finding the Fourth Proportional to 658.51, 987.24 and 329.28

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Solution

The fourth proportional to 658.51, 987.24 and 329.28 is: 493.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.51 : 987.24 = 329.28 : x
  2. Step 2: Convert to fraction form
    658.51/987.24 = 329.28/x
  3. Step 3: Cross multiply
    658.51x = 987.24 × 329.28
  4. Step 4: Simplify right side
    658.51x = 325,075.92
  5. Step 5: Solve for x
    x = 325,075.92/658.51
  6. Step 6: Final answer
    x = 493.66

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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.