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Finding the Fourth Proportional to 672.53, 1,013.39 and 553.46

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Solution

The fourth proportional to 672.53, 1,013.39 and 553.46 is: 833.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.53 : 1,013.39 = 553.46 : x
  2. Step 2: Convert to fraction form
    672.53/1,013.39 = 553.46/x
  3. Step 3: Cross multiply
    672.53x = 1,013.39 × 553.46
  4. Step 4: Simplify right side
    672.53x = 560,870.83
  5. Step 5: Solve for x
    x = 560,870.83/672.53
  6. Step 6: Final answer
    x = 833.97

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.