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Finding the Fourth Proportional to 722.08, 1,082.56 and 356.32

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Solution

The fourth proportional to 722.08, 1,082.56 and 356.32 is: 534.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    722.08 : 1,082.56 = 356.32 : x
  2. Step 2: Convert to fraction form
    722.08/1,082.56 = 356.32/x
  3. Step 3: Cross multiply
    722.08x = 1,082.56 × 356.32
  4. Step 4: Simplify right side
    722.08x = 385,737.78
  5. Step 5: Solve for x
    x = 385,737.78/722.08
  6. Step 6: Final answer
    x = 534.20

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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.