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Finding the Fourth Proportional to 1,248.54, 1,718.91 and 1,082.22

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Solution

The fourth proportional to 1,248.54, 1,718.91 and 1,082.22 is: 1,489.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,248.54 : 1,718.91 = 1,082.22 : x
  2. Step 2: Convert to fraction form
    1,248.54/1,718.91 = 1,082.22/x
  3. Step 3: Cross multiply
    1,248.54x = 1,718.91 × 1,082.22
  4. Step 4: Simplify right side
    1,248.54x = 1,860,238.78
  5. Step 5: Solve for x
    x = 1,860,238.78/1,248.54
  6. Step 6: Final answer
    x = 1,489.93

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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.