Home / 2,511.71-3,769.88-1,280

Finding the Fourth Proportional to 2,511.71, 3,769.88 and 1,280

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Solution

The fourth proportional to 2,511.71, 3,769.88 and 1,280 is: 1,921.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,511.71 : 3,769.88 = 1,280 : x
  2. Step 2: Convert to fraction form
    2,511.71/3,769.88 = 1,280/x
  3. Step 3: Cross multiply
    2,511.71x = 3,769.88 × 1,280
  4. Step 4: Simplify right side
    2,511.71x = 4,825,446.40
  5. Step 5: Solve for x
    x = 4,825,446.40/2,511.71
  6. Step 6: Final answer
    x = 1,921.18

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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.