Home / 1,277.56-1,764.35-1,100.17

Finding the Fourth Proportional to 1,277.56, 1,764.35 and 1,100.17

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Solution

The fourth proportional to 1,277.56, 1,764.35 and 1,100.17 is: 1,519.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,277.56 : 1,764.35 = 1,100.17 : x
  2. Step 2: Convert to fraction form
    1,277.56/1,764.35 = 1,100.17/x
  3. Step 3: Cross multiply
    1,277.56x = 1,764.35 × 1,100.17
  4. Step 4: Simplify right side
    1,277.56x = 1,941,084.94
  5. Step 5: Solve for x
    x = 1,941,084.94/1,277.56
  6. Step 6: Final answer
    x = 1,519.37

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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.