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Finding the Fourth Proportional to 799.68, 1,103.16 and 688.96

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Solution

The fourth proportional to 799.68, 1,103.16 and 688.96 is: 950.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    799.68 : 1,103.16 = 688.96 : x
  2. Step 2: Convert to fraction form
    799.68/1,103.16 = 688.96/x
  3. Step 3: Cross multiply
    799.68x = 1,103.16 × 688.96
  4. Step 4: Simplify right side
    799.68x = 760,032.04
  5. Step 5: Solve for x
    x = 760,032.04/799.68
  6. Step 6: Final answer
    x = 950.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.