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Finding the Fourth Proportional to 658.65, 987.12 and 350.64

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Solution

The fourth proportional to 658.65, 987.12 and 350.64 is: 525.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    658.65 : 987.12 = 350.64 : x
  2. Step 2: Convert to fraction form
    658.65/987.12 = 350.64/x
  3. Step 3: Cross multiply
    658.65x = 987.12 × 350.64
  4. Step 4: Simplify right side
    658.65x = 346,123.76
  5. Step 5: Solve for x
    x = 346,123.76/658.65
  6. Step 6: Final answer
    x = 525.50

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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.