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Finding the Fourth Proportional to 1,458.56, 2,187.36 and 484.40

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Solution

The fourth proportional to 1,458.56, 2,187.36 and 484.40 is: 726.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,458.56 : 2,187.36 = 484.40 : x
  2. Step 2: Convert to fraction form
    1,458.56/2,187.36 = 484.40/x
  3. Step 3: Cross multiply
    1,458.56x = 2,187.36 × 484.40
  4. Step 4: Simplify right side
    1,458.56x = 1,059,546.25
  5. Step 5: Solve for x
    x = 1,059,546.25/1,458.56
  6. Step 6: Final answer
    x = 726.44

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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.