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Finding the Fourth Proportional to 1,184.56, 1,634.30 and 687.02

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Solution

The fourth proportional to 1,184.56, 1,634.30 and 687.02 is: 947.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,184.56 : 1,634.30 = 687.02 : x
  2. Step 2: Convert to fraction form
    1,184.56/1,634.30 = 687.02/x
  3. Step 3: Cross multiply
    1,184.56x = 1,634.30 × 687.02
  4. Step 4: Simplify right side
    1,184.56x = 1,122,789.27
  5. Step 5: Solve for x
    x = 1,122,789.27/1,184.56
  6. Step 6: Final answer
    x = 947.85

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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.