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Finding the Fourth Proportional to 668.56, 1,003.10 and 235.75

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Solution

The fourth proportional to 668.56, 1,003.10 and 235.75 is: 353.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    668.56 : 1,003.10 = 235.75 : x
  2. Step 2: Convert to fraction form
    668.56/1,003.10 = 235.75/x
  3. Step 3: Cross multiply
    668.56x = 1,003.10 × 235.75
  4. Step 4: Simplify right side
    668.56x = 236,480.83
  5. Step 5: Solve for x
    x = 236,480.83/668.56
  6. Step 6: Final answer
    x = 353.72

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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.