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Finding the Fourth Proportional to 699.56, 1,049.74 and 697.92

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Solution

The fourth proportional to 699.56, 1,049.74 and 697.92 is: 1,047.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    699.56 : 1,049.74 = 697.92 : x
  2. Step 2: Convert to fraction form
    699.56/1,049.74 = 697.92/x
  3. Step 3: Cross multiply
    699.56x = 1,049.74 × 697.92
  4. Step 4: Simplify right side
    699.56x = 732,634.54
  5. Step 5: Solve for x
    x = 732,634.54/699.56
  6. Step 6: Final answer
    x = 1,047.28

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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.