Home / 1,781.46-2,458.35-1,258.20

Finding the Fourth Proportional to 1,781.46, 2,458.35 and 1,258.20

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Solution

The fourth proportional to 1,781.46, 2,458.35 and 1,258.20 is: 1,736.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,781.46 : 2,458.35 = 1,258.20 : x
  2. Step 2: Convert to fraction form
    1,781.46/2,458.35 = 1,258.20/x
  3. Step 3: Cross multiply
    1,781.46x = 2,458.35 × 1,258.20
  4. Step 4: Simplify right side
    1,781.46x = 3,093,095.97
  5. Step 5: Solve for x
    x = 3,093,095.97/1,781.46
  6. Step 6: Final answer
    x = 1,736.27

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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.