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Finding the Fourth Proportional to 668.25, 1,002.47 and 229.55

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Solution

The fourth proportional to 668.25, 1,002.47 and 229.55 is: 344.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    668.25 : 1,002.47 = 229.55 : x
  2. Step 2: Convert to fraction form
    668.25/1,002.47 = 229.55/x
  3. Step 3: Cross multiply
    668.25x = 1,002.47 × 229.55
  4. Step 4: Simplify right side
    668.25x = 230,110.83
  5. Step 5: Solve for x
    x = 230,110.83/668.25
  6. Step 6: Final answer
    x = 344.35

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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.