Home / 1,277.62-1,761.33-1,080.34

Finding the Fourth Proportional to 1,277.62, 1,761.33 and 1,080.34

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Solution

The fourth proportional to 1,277.62, 1,761.33 and 1,080.34 is: 1,489.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,277.62 : 1,761.33 = 1,080.34 : x
  2. Step 2: Convert to fraction form
    1,277.62/1,761.33 = 1,080.34/x
  3. Step 3: Cross multiply
    1,277.62x = 1,761.33 × 1,080.34
  4. Step 4: Simplify right side
    1,277.62x = 1,902,835.25
  5. Step 5: Solve for x
    x = 1,902,835.25/1,277.62
  6. Step 6: Final answer
    x = 1,489.36

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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.