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Finding the Fourth Proportional to 672.31, 1,013.03 and 553.24

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Solution

The fourth proportional to 672.31, 1,013.03 and 553.24 is: 833.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.31 : 1,013.03 = 553.24 : x
  2. Step 2: Convert to fraction form
    672.31/1,013.03 = 553.24/x
  3. Step 3: Cross multiply
    672.31x = 1,013.03 × 553.24
  4. Step 4: Simplify right side
    672.31x = 560,448.72
  5. Step 5: Solve for x
    x = 560,448.72/672.31
  6. Step 6: Final answer
    x = 833.62

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Double scale
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1.5x scale

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.