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Finding the Fourth Proportional to 668.79, 1,001.66 and 484.29

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Solution

The fourth proportional to 668.79, 1,001.66 and 484.29 is: 725.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    668.79 : 1,001.66 = 484.29 : x
  2. Step 2: Convert to fraction form
    668.79/1,001.66 = 484.29/x
  3. Step 3: Cross multiply
    668.79x = 1,001.66 × 484.29
  4. Step 4: Simplify right side
    668.79x = 485,091.50
  5. Step 5: Solve for x
    x = 485,091.50/668.79
  6. Step 6: Final answer
    x = 725.33

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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.