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Finding the Fourth Proportional to 762.11, 1,049.30 and 672.27

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Solution

The fourth proportional to 762.11, 1,049.30 and 672.27 is: 925.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    762.11 : 1,049.30 = 672.27 : x
  2. Step 2: Convert to fraction form
    762.11/1,049.30 = 672.27/x
  3. Step 3: Cross multiply
    762.11x = 1,049.30 × 672.27
  4. Step 4: Simplify right side
    762.11x = 705,420.77
  5. Step 5: Solve for x
    x = 705,420.77/762.11
  6. Step 6: Final answer
    x = 925.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.