Home / 2,811.54-4,218.52-1,079.76

Finding the Fourth Proportional to 2,811.54, 4,218.52 and 1,079.76

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Solution

The fourth proportional to 2,811.54, 4,218.52 and 1,079.76 is: 1,620.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,811.54 : 4,218.52 = 1,079.76 : x
  2. Step 2: Convert to fraction form
    2,811.54/4,218.52 = 1,079.76/x
  3. Step 3: Cross multiply
    2,811.54x = 4,218.52 × 1,079.76
  4. Step 4: Simplify right side
    2,811.54x = 4,554,989.16
  5. Step 5: Solve for x
    x = 4,554,989.16/2,811.54
  6. Step 6: Final answer
    x = 1,620.10

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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.