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Finding the Fourth Proportional to 1,082.24, 1,493.10 and 640.16

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Solution

The fourth proportional to 1,082.24, 1,493.10 and 640.16 is: 883.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,082.24 : 1,493.10 = 640.16 : x
  2. Step 2: Convert to fraction form
    1,082.24/1,493.10 = 640.16/x
  3. Step 3: Cross multiply
    1,082.24x = 1,493.10 × 640.16
  4. Step 4: Simplify right side
    1,082.24x = 955,822.90
  5. Step 5: Solve for x
    x = 955,822.90/1,082.24
  6. Step 6: Final answer
    x = 883.19

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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.