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Finding the Fourth Proportional to 1,261.52, 1,892.00 and 481.24

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Solution

The fourth proportional to 1,261.52, 1,892.00 and 481.24 is: 721.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,261.52 : 1,892.00 = 481.24 : x
  2. Step 2: Convert to fraction form
    1,261.52/1,892.00 = 481.24/x
  3. Step 3: Cross multiply
    1,261.52x = 1,892.00 × 481.24
  4. Step 4: Simplify right side
    1,261.52x = 910,506.26
  5. Step 5: Solve for x
    x = 910,506.26/1,261.52
  6. Step 6: Final answer
    x = 721.75

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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.