Home / 1,977.24-2,728.80-1,231.92

Finding the Fourth Proportional to 1,977.24, 2,728.80 and 1,231.92

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Solution

The fourth proportional to 1,977.24, 2,728.80 and 1,231.92 is: 1,700.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,977.24 : 2,728.80 = 1,231.92 : x
  2. Step 2: Convert to fraction form
    1,977.24/2,728.80 = 1,231.92/x
  3. Step 3: Cross multiply
    1,977.24x = 2,728.80 × 1,231.92
  4. Step 4: Simplify right side
    1,977.24x = 3,361,663.30
  5. Step 5: Solve for x
    x = 3,361,663.30/1,977.24
  6. Step 6: Final answer
    x = 1,700.18

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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.