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Finding the Fourth Proportional to 1,028.43, 1,541.10 and 767.20

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Solution

The fourth proportional to 1,028.43, 1,541.10 and 767.20 is: 1,149.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,028.43 : 1,541.10 = 767.20 : x
  2. Step 2: Convert to fraction form
    1,028.43/1,541.10 = 767.20/x
  3. Step 3: Cross multiply
    1,028.43x = 1,541.10 × 767.20
  4. Step 4: Simplify right side
    1,028.43x = 1,182,331.92
  5. Step 5: Solve for x
    x = 1,182,331.92/1,028.43
  6. Step 6: Final answer
    x = 1,149.65

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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.