Home / 1,742.56-2,612.40-1,280.32

Finding the Fourth Proportional to 1,742.56, 2,612.40 and 1,280.32

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Solution

The fourth proportional to 1,742.56, 2,612.40 and 1,280.32 is: 1,919.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,742.56 : 2,612.40 = 1,280.32 : x
  2. Step 2: Convert to fraction form
    1,742.56/2,612.40 = 1,280.32/x
  3. Step 3: Cross multiply
    1,742.56x = 2,612.40 × 1,280.32
  4. Step 4: Simplify right side
    1,742.56x = 3,344,707.97
  5. Step 5: Solve for x
    x = 3,344,707.97/1,742.56
  6. Step 6: Final answer
    x = 1,919.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.