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Finding the Fourth Proportional to 668.31, 1,002.66 and 235.41

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Solution

The fourth proportional to 668.31, 1,002.66 and 235.41 is: 353.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    668.31 : 1,002.66 = 235.41 : x
  2. Step 2: Convert to fraction form
    668.31/1,002.66 = 235.41/x
  3. Step 3: Cross multiply
    668.31x = 1,002.66 × 235.41
  4. Step 4: Simplify right side
    668.31x = 236,036.19
  5. Step 5: Solve for x
    x = 236,036.19/668.31
  6. Step 6: Final answer
    x = 353.18

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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.