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Finding the Fourth Proportional to 834.56, 1,252.05 and 257.44

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Solution

The fourth proportional to 834.56, 1,252.05 and 257.44 is: 386.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    834.56 : 1,252.05 = 257.44 : x
  2. Step 2: Convert to fraction form
    834.56/1,252.05 = 257.44/x
  3. Step 3: Cross multiply
    834.56x = 1,252.05 × 257.44
  4. Step 4: Simplify right side
    834.56x = 322,323.66
  5. Step 5: Solve for x
    x = 322,323.66/834.56
  6. Step 6: Final answer
    x = 386.22

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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.