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Finding the Fourth Proportional to 722.88, 1,083.24 and 668.88

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Solution

The fourth proportional to 722.88, 1,083.24 and 668.88 is: 1,002.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    722.88 : 1,083.24 = 668.88 : x
  2. Step 2: Convert to fraction form
    722.88/1,083.24 = 668.88/x
  3. Step 3: Cross multiply
    722.88x = 1,083.24 × 668.88
  4. Step 4: Simplify right side
    722.88x = 724,557.57
  5. Step 5: Solve for x
    x = 724,557.57/722.88
  6. Step 6: Final answer
    x = 1,002.32

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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.