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Finding the Fourth Proportional to 701.71, 1,057.64 and 662.02

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Solution

The fourth proportional to 701.71, 1,057.64 and 662.02 is: 997.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    701.71 : 1,057.64 = 662.02 : x
  2. Step 2: Convert to fraction form
    701.71/1,057.64 = 662.02/x
  3. Step 3: Cross multiply
    701.71x = 1,057.64 × 662.02
  4. Step 4: Simplify right side
    701.71x = 700,178.83
  5. Step 5: Solve for x
    x = 700,178.83/701.71
  6. Step 6: Final answer
    x = 997.82

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.