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Finding the Fourth Proportional to 701.65, 1,052.71 and 311.92

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Solution

The fourth proportional to 701.65, 1,052.71 and 311.92 is: 467.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    701.65 : 1,052.71 = 311.92 : x
  2. Step 2: Convert to fraction form
    701.65/1,052.71 = 311.92/x
  3. Step 3: Cross multiply
    701.65x = 1,052.71 × 311.92
  4. Step 4: Simplify right side
    701.65x = 328,361.38
  5. Step 5: Solve for x
    x = 328,361.38/701.65
  6. Step 6: Final answer
    x = 467.99

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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.