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Finding the Fourth Proportional to 1,260.54, 1,879.70 and 1,172.88

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Solution

The fourth proportional to 1,260.54, 1,879.70 and 1,172.88 is: 1,748.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,260.54 : 1,879.70 = 1,172.88 : x
  2. Step 2: Convert to fraction form
    1,260.54/1,879.70 = 1,172.88/x
  3. Step 3: Cross multiply
    1,260.54x = 1,879.70 × 1,172.88
  4. Step 4: Simplify right side
    1,260.54x = 2,204,656.67
  5. Step 5: Solve for x
    x = 2,204,656.67/1,260.54
  6. Step 6: Final answer
    x = 1,748.98

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.