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Finding the Fourth Proportional to 1,285.27, 1,774.44 and 843.95

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Solution

The fourth proportional to 1,285.27, 1,774.44 and 843.95 is: 1,165.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285.27 : 1,774.44 = 843.95 : x
  2. Step 2: Convert to fraction form
    1,285.27/1,774.44 = 843.95/x
  3. Step 3: Cross multiply
    1,285.27x = 1,774.44 × 843.95
  4. Step 4: Simplify right side
    1,285.27x = 1,497,534.20
  5. Step 5: Solve for x
    x = 1,497,534.20/1,285.27
  6. Step 6: Final answer
    x = 1,165.15

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.