Home / 1,276.23-1,761.18-745.47

Finding the Fourth Proportional to 1,276.23, 1,761.18 and 745.47

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Solution

The fourth proportional to 1,276.23, 1,761.18 and 745.47 is: 1,028.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,276.23 : 1,761.18 = 745.47 : x
  2. Step 2: Convert to fraction form
    1,276.23/1,761.18 = 745.47/x
  3. Step 3: Cross multiply
    1,276.23x = 1,761.18 × 745.47
  4. Step 4: Simplify right side
    1,276.23x = 1,312,906.85
  5. Step 5: Solve for x
    x = 1,312,906.85/1,276.23
  6. Step 6: Final answer
    x = 1,028.74

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1.5x scale

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.