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Finding the Fourth Proportional to 1,082.46, 1,623.93 and 379.71

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Solution

The fourth proportional to 1,082.46, 1,623.93 and 379.71 is: 569.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,082.46 : 1,623.93 = 379.71 : x
  2. Step 2: Convert to fraction form
    1,082.46/1,623.93 = 379.71/x
  3. Step 3: Cross multiply
    1,082.46x = 1,623.93 × 379.71
  4. Step 4: Simplify right side
    1,082.46x = 616,622.46
  5. Step 5: Solve for x
    x = 616,622.46/1,082.46
  6. Step 6: Final answer
    x = 569.65

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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.