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Finding the Fourth Proportional to 1,182.78, 1,774.53 and 694.80

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Solution

The fourth proportional to 1,182.78, 1,774.53 and 694.80 is: 1,042.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,182.78 : 1,774.53 = 694.80 : x
  2. Step 2: Convert to fraction form
    1,182.78/1,774.53 = 694.80/x
  3. Step 3: Cross multiply
    1,182.78x = 1,774.53 × 694.80
  4. Step 4: Simplify right side
    1,182.78x = 1,232,943.44
  5. Step 5: Solve for x
    x = 1,232,943.44/1,182.78
  6. Step 6: Final answer
    x = 1,042.41

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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.