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Finding the Fourth Proportional to 672.97, 1,008.62 and 239.65

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Solution

The fourth proportional to 672.97, 1,008.62 and 239.65 is: 359.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.97 : 1,008.62 = 239.65 : x
  2. Step 2: Convert to fraction form
    672.97/1,008.62 = 239.65/x
  3. Step 3: Cross multiply
    672.97x = 1,008.62 × 239.65
  4. Step 4: Simplify right side
    672.97x = 241,714.58
  5. Step 5: Solve for x
    x = 241,714.58/672.97
  6. Step 6: Final answer
    x = 359.18

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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.