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Finding the Fourth Proportional to 799.64, 1,102.98 and 667.46

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Solution

The fourth proportional to 799.64, 1,102.98 and 667.46 is: 920.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    799.64 : 1,102.98 = 667.46 : x
  2. Step 2: Convert to fraction form
    799.64/1,102.98 = 667.46/x
  3. Step 3: Cross multiply
    799.64x = 1,102.98 × 667.46
  4. Step 4: Simplify right side
    799.64x = 736,195.03
  5. Step 5: Solve for x
    x = 736,195.03/799.64
  6. Step 6: Final answer
    x = 920.66

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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.