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Finding the Fourth Proportional to 668.24, 1,002.51 and 235.39

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Solution

The fourth proportional to 668.24, 1,002.51 and 235.39 is: 353.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    668.24 : 1,002.51 = 235.39 : x
  2. Step 2: Convert to fraction form
    668.24/1,002.51 = 235.39/x
  3. Step 3: Cross multiply
    668.24x = 1,002.51 × 235.39
  4. Step 4: Simplify right side
    668.24x = 235,979.65
  5. Step 5: Solve for x
    x = 235,979.65/668.24
  6. Step 6: Final answer
    x = 353.14

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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.