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Finding the Fourth Proportional to 1,260.29, 1,889.90 and 675.17

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Solution

The fourth proportional to 1,260.29, 1,889.90 and 675.17 is: 1,012.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,260.29 : 1,889.90 = 675.17 : x
  2. Step 2: Convert to fraction form
    1,260.29/1,889.90 = 675.17/x
  3. Step 3: Cross multiply
    1,260.29x = 1,889.90 × 675.17
  4. Step 4: Simplify right side
    1,260.29x = 1,276,003.78
  5. Step 5: Solve for x
    x = 1,276,003.78/1,260.29
  6. Step 6: Final answer
    x = 1,012.47

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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.