Home / 1,928.40-2,660.67-1,142.16

Finding the Fourth Proportional to 1,928.40, 2,660.67 and 1,142.16

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Solution

The fourth proportional to 1,928.40, 2,660.67 and 1,142.16 is: 1,575.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,928.40 : 2,660.67 = 1,142.16 : x
  2. Step 2: Convert to fraction form
    1,928.40/2,660.67 = 1,142.16/x
  3. Step 3: Cross multiply
    1,928.40x = 2,660.67 × 1,142.16
  4. Step 4: Simplify right side
    1,928.40x = 3,038,910.85
  5. Step 5: Solve for x
    x = 3,038,910.85/1,928.40
  6. Step 6: Final answer
    x = 1,575.87

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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.