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Finding the Fourth Proportional to 914.96, 1,371.96 and 722

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Solution

The fourth proportional to 914.96, 1,371.96 and 722 is: 1,082.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    914.96 : 1,371.96 = 722 : x
  2. Step 2: Convert to fraction form
    914.96/1,371.96 = 722/x
  3. Step 3: Cross multiply
    914.96x = 1,371.96 × 722
  4. Step 4: Simplify right side
    914.96x = 990,555.12
  5. Step 5: Solve for x
    x = 990,555.12/914.96
  6. Step 6: Final answer
    x = 1,082.62

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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.