Home / 1,082.16-1,493.57-640.31

Finding the Fourth Proportional to 1,082.16, 1,493.57 and 640.31

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Solution

The fourth proportional to 1,082.16, 1,493.57 and 640.31 is: 883.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,082.16 : 1,493.57 = 640.31 : x
  2. Step 2: Convert to fraction form
    1,082.16/1,493.57 = 640.31/x
  3. Step 3: Cross multiply
    1,082.16x = 1,493.57 × 640.31
  4. Step 4: Simplify right side
    1,082.16x = 956,341.94
  5. Step 5: Solve for x
    x = 956,341.94/1,082.16
  6. Step 6: Final answer
    x = 883.73

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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.