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Finding the Fourth Proportional to 775.64, 1,160.22 and 699.90

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Solution

The fourth proportional to 775.64, 1,160.22 and 699.90 is: 1,046.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    775.64 : 1,160.22 = 699.90 : x
  2. Step 2: Convert to fraction form
    775.64/1,160.22 = 699.90/x
  3. Step 3: Cross multiply
    775.64x = 1,160.22 × 699.90
  4. Step 4: Simplify right side
    775.64x = 812,037.98
  5. Step 5: Solve for x
    x = 812,037.98/775.64
  6. Step 6: Final answer
    x = 1,046.93

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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.