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Finding the Fourth Proportional to 1,863.10, 2,792.63 and 767.17

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Solution

The fourth proportional to 1,863.10, 2,792.63 and 767.17 is: 1,149.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,863.10 : 2,792.63 = 767.17 : x
  2. Step 2: Convert to fraction form
    1,863.10/2,792.63 = 767.17/x
  3. Step 3: Cross multiply
    1,863.10x = 2,792.63 × 767.17
  4. Step 4: Simplify right side
    1,863.10x = 2,142,418.12
  5. Step 5: Solve for x
    x = 2,142,418.12/1,863.10
  6. Step 6: Final answer
    x = 1,149.92

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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.