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Finding the Fourth Proportional to 701.61, 1,052.69 and 311.42

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Solution

The fourth proportional to 701.61, 1,052.69 and 311.42 is: 467.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    701.61 : 1,052.69 = 311.42 : x
  2. Step 2: Convert to fraction form
    701.61/1,052.69 = 311.42/x
  3. Step 3: Cross multiply
    701.61x = 1,052.69 × 311.42
  4. Step 4: Simplify right side
    701.61x = 327,828.72
  5. Step 5: Solve for x
    x = 327,828.72/701.61
  6. Step 6: Final answer
    x = 467.25

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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.