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Finding the Fourth Proportional to 798.66, 1,199.17 and 689.83

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Solution

The fourth proportional to 798.66, 1,199.17 and 689.83 is: 1,035.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    798.66 : 1,199.17 = 689.83 : x
  2. Step 2: Convert to fraction form
    798.66/1,199.17 = 689.83/x
  3. Step 3: Cross multiply
    798.66x = 1,199.17 × 689.83
  4. Step 4: Simplify right side
    798.66x = 827,221.31
  5. Step 5: Solve for x
    x = 827,221.31/798.66
  6. Step 6: Final answer
    x = 1,035.76

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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.