Home / 2,143.11-2,956.28-1,258.74

Finding the Fourth Proportional to 2,143.11, 2,956.28 and 1,258.74

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Solution

The fourth proportional to 2,143.11, 2,956.28 and 1,258.74 is: 1,736.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,143.11 : 2,956.28 = 1,258.74 : x
  2. Step 2: Convert to fraction form
    2,143.11/2,956.28 = 1,258.74/x
  3. Step 3: Cross multiply
    2,143.11x = 2,956.28 × 1,258.74
  4. Step 4: Simplify right side
    2,143.11x = 3,721,187.89
  5. Step 5: Solve for x
    x = 3,721,187.89/2,143.11
  6. Step 6: Final answer
    x = 1,736.35

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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.