Home / 1,391.28-2,077.04-1,172.56

Finding the Fourth Proportional to 1,391.28, 2,077.04 and 1,172.56

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Solution

The fourth proportional to 1,391.28, 2,077.04 and 1,172.56 is: 1,750.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391.28 : 2,077.04 = 1,172.56 : x
  2. Step 2: Convert to fraction form
    1,391.28/2,077.04 = 1,172.56/x
  3. Step 3: Cross multiply
    1,391.28x = 2,077.04 × 1,172.56
  4. Step 4: Simplify right side
    1,391.28x = 2,435,454.02
  5. Step 5: Solve for x
    x = 2,435,454.02/1,391.28
  6. Step 6: Final answer
    x = 1,750.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.