Home / 1,780.28-2,668.89-1,258.64

Finding the Fourth Proportional to 1,780.28, 2,668.89 and 1,258.64

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Solution

The fourth proportional to 1,780.28, 2,668.89 and 1,258.64 is: 1,886.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,780.28 : 2,668.89 = 1,258.64 : x
  2. Step 2: Convert to fraction form
    1,780.28/2,668.89 = 1,258.64/x
  3. Step 3: Cross multiply
    1,780.28x = 2,668.89 × 1,258.64
  4. Step 4: Simplify right side
    1,780.28x = 3,359,158.37
  5. Step 5: Solve for x
    x = 3,359,158.37/1,780.28
  6. Step 6: Final answer
    x = 1,886.88

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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.