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Finding the Fourth Proportional to 1,104.74, 1,660.55 and 696.50

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Solution

The fourth proportional to 1,104.74, 1,660.55 and 696.50 is: 1,046.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,104.74 : 1,660.55 = 696.50 : x
  2. Step 2: Convert to fraction form
    1,104.74/1,660.55 = 696.50/x
  3. Step 3: Cross multiply
    1,104.74x = 1,660.55 × 696.50
  4. Step 4: Simplify right side
    1,104.74x = 1,156,561.29
  5. Step 5: Solve for x
    x = 1,156,561.29/1,104.74
  6. Step 6: Final answer
    x = 1,046.91

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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.