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Finding the Fourth Proportional to 1,275.97, 1,761.22 and 745.00

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Solution

The fourth proportional to 1,275.97, 1,761.22 and 745.00 is: 1,028.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,275.97 : 1,761.22 = 745.00 : x
  2. Step 2: Convert to fraction form
    1,275.97/1,761.22 = 745.00/x
  3. Step 3: Cross multiply
    1,275.97x = 1,761.22 × 745.00
  4. Step 4: Simplify right side
    1,275.97x = 1,312,102.63
  5. Step 5: Solve for x
    x = 1,312,102.63/1,275.97
  6. Step 6: Final answer
    x = 1,028.32

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.