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Finding the Fourth Proportional to 701.19, 1,049.81 and 392.49

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Solution

The fourth proportional to 701.19, 1,049.81 and 392.49 is: 587.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    701.19 : 1,049.81 = 392.49 : x
  2. Step 2: Convert to fraction form
    701.19/1,049.81 = 392.49/x
  3. Step 3: Cross multiply
    701.19x = 1,049.81 × 392.49
  4. Step 4: Simplify right side
    701.19x = 412,037.96
  5. Step 5: Solve for x
    x = 412,037.96/701.19
  6. Step 6: Final answer
    x = 587.63

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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.