Home / 1,082.43-1,623.21-389.11

Finding the Fourth Proportional to 1,082.43, 1,623.21 and 389.11

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Solution

The fourth proportional to 1,082.43, 1,623.21 and 389.11 is: 583.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,082.43 : 1,623.21 = 389.11 : x
  2. Step 2: Convert to fraction form
    1,082.43/1,623.21 = 389.11/x
  3. Step 3: Cross multiply
    1,082.43x = 1,623.21 × 389.11
  4. Step 4: Simplify right side
    1,082.43x = 631,607.24
  5. Step 5: Solve for x
    x = 631,607.24/1,082.43
  6. Step 6: Final answer
    x = 583.51

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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.