Home / 1,711.80-2,565.18-1,278.72

Finding the Fourth Proportional to 1,711.80, 2,565.18 and 1,278.72

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Solution

The fourth proportional to 1,711.80, 2,565.18 and 1,278.72 is: 1,916.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,711.80 : 2,565.18 = 1,278.72 : x
  2. Step 2: Convert to fraction form
    1,711.80/2,565.18 = 1,278.72/x
  3. Step 3: Cross multiply
    1,711.80x = 2,565.18 × 1,278.72
  4. Step 4: Simplify right side
    1,711.80x = 3,280,146.97
  5. Step 5: Solve for x
    x = 3,280,146.97/1,711.80
  6. Step 6: Final answer
    x = 1,916.20

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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.