Home / 1,928.18-2,660.91-1,131.68

Finding the Fourth Proportional to 1,928.18, 2,660.91 and 1,131.68

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Solution

The fourth proportional to 1,928.18, 2,660.91 and 1,131.68 is: 1,561.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,928.18 : 2,660.91 = 1,131.68 : x
  2. Step 2: Convert to fraction form
    1,928.18/2,660.91 = 1,131.68/x
  3. Step 3: Cross multiply
    1,928.18x = 2,660.91 × 1,131.68
  4. Step 4: Simplify right side
    1,928.18x = 3,011,298.63
  5. Step 5: Solve for x
    x = 3,011,298.63/1,928.18
  6. Step 6: Final answer
    x = 1,561.73

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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.