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Finding the Fourth Proportional to 1,276.29, 1,760.74 and 745.13

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Solution

The fourth proportional to 1,276.29, 1,760.74 and 745.13 is: 1,027.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,276.29 : 1,760.74 = 745.13 : x
  2. Step 2: Convert to fraction form
    1,276.29/1,760.74 = 745.13/x
  3. Step 3: Cross multiply
    1,276.29x = 1,760.74 × 745.13
  4. Step 4: Simplify right side
    1,276.29x = 1,311,982.74
  5. Step 5: Solve for x
    x = 1,311,982.74/1,276.29
  6. Step 6: Final answer
    x = 1,027.97

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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.