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Finding the Fourth Proportional to 698.56, 1,048.24 and 696.92

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Solution

The fourth proportional to 698.56, 1,048.24 and 696.92 is: 1,045.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    698.56 : 1,048.24 = 696.92 : x
  2. Step 2: Convert to fraction form
    698.56/1,048.24 = 696.92/x
  3. Step 3: Cross multiply
    698.56x = 1,048.24 × 696.92
  4. Step 4: Simplify right side
    698.56x = 730,539.42
  5. Step 5: Solve for x
    x = 730,539.42/698.56
  6. Step 6: Final answer
    x = 1,045.78

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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.