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Finding the Fourth Proportional to 674.38, 1,011.66 and 235.72

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Solution

The fourth proportional to 674.38, 1,011.66 and 235.72 is: 353.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    674.38 : 1,011.66 = 235.72 : x
  2. Step 2: Convert to fraction form
    674.38/1,011.66 = 235.72/x
  3. Step 3: Cross multiply
    674.38x = 1,011.66 × 235.72
  4. Step 4: Simplify right side
    674.38x = 238,468.50
  5. Step 5: Solve for x
    x = 238,468.50/674.38
  6. Step 6: Final answer
    x = 353.61

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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.