Home / 2,125.06-3,187.56-1,258.78

Finding the Fourth Proportional to 2,125.06, 3,187.56 and 1,258.78

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Solution

The fourth proportional to 2,125.06, 3,187.56 and 1,258.78 is: 1,888.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,125.06 : 3,187.56 = 1,258.78 : x
  2. Step 2: Convert to fraction form
    2,125.06/3,187.56 = 1,258.78/x
  3. Step 3: Cross multiply
    2,125.06x = 3,187.56 × 1,258.78
  4. Step 4: Simplify right side
    2,125.06x = 4,012,436.78
  5. Step 5: Solve for x
    x = 4,012,436.78/2,125.06
  6. Step 6: Final answer
    x = 1,888.15

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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.