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Finding the Fourth Proportional to 1,082.78, 1,623.86 and 352.42

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Solution

The fourth proportional to 1,082.78, 1,623.86 and 352.42 is: 528.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,082.78 : 1,623.86 = 352.42 : x
  2. Step 2: Convert to fraction form
    1,082.78/1,623.86 = 352.42/x
  3. Step 3: Cross multiply
    1,082.78x = 1,623.86 × 352.42
  4. Step 4: Simplify right side
    1,082.78x = 572,276.24
  5. Step 5: Solve for x
    x = 572,276.24/1,082.78
  6. Step 6: Final answer
    x = 528.53

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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.