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Finding the Fourth Proportional to 672.73, 1,009.49 and 605.50

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Solution

The fourth proportional to 672.73, 1,009.49 and 605.50 is: 908.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.73 : 1,009.49 = 605.50 : x
  2. Step 2: Convert to fraction form
    672.73/1,009.49 = 605.50/x
  3. Step 3: Cross multiply
    672.73x = 1,009.49 × 605.50
  4. Step 4: Simplify right side
    672.73x = 611,246.20
  5. Step 5: Solve for x
    x = 611,246.20/672.73
  6. Step 6: Final answer
    x = 908.61

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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.