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Finding the Fourth Proportional to 722.24, 1,082.90 and 356.56

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Solution

The fourth proportional to 722.24, 1,082.90 and 356.56 is: 534.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    722.24 : 1,082.90 = 356.56 : x
  2. Step 2: Convert to fraction form
    722.24/1,082.90 = 356.56/x
  3. Step 3: Cross multiply
    722.24x = 1,082.90 × 356.56
  4. Step 4: Simplify right side
    722.24x = 386,118.82
  5. Step 5: Solve for x
    x = 386,118.82/722.24
  6. Step 6: Final answer
    x = 534.61

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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.