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Finding the Fourth Proportional to 701.74, 1,052.79 and 393.82

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Solution

The fourth proportional to 701.74, 1,052.79 and 393.82 is: 590.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    701.74 : 1,052.79 = 393.82 : x
  2. Step 2: Convert to fraction form
    701.74/1,052.79 = 393.82/x
  3. Step 3: Cross multiply
    701.74x = 1,052.79 × 393.82
  4. Step 4: Simplify right side
    701.74x = 414,609.76
  5. Step 5: Solve for x
    x = 414,609.76/701.74
  6. Step 6: Final answer
    x = 590.83

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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.