Home / 1,928.70-2,660.88-1,265.91

Finding the Fourth Proportional to 1,928.70, 2,660.88 and 1,265.91

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Solution

The fourth proportional to 1,928.70, 2,660.88 and 1,265.91 is: 1,746.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,928.70 : 2,660.88 = 1,265.91 : x
  2. Step 2: Convert to fraction form
    1,928.70/2,660.88 = 1,265.91/x
  3. Step 3: Cross multiply
    1,928.70x = 2,660.88 × 1,265.91
  4. Step 4: Simplify right side
    1,928.70x = 3,368,434.60
  5. Step 5: Solve for x
    x = 3,368,434.60/1,928.70
  6. Step 6: Final answer
    x = 1,746.48

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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.