Home / 1,386.73-2,080.50-949.78

Finding the Fourth Proportional to 1,386.73, 2,080.50 and 949.78

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Solution

The fourth proportional to 1,386.73, 2,080.50 and 949.78 is: 1,424.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,386.73 : 2,080.50 = 949.78 : x
  2. Step 2: Convert to fraction form
    1,386.73/2,080.50 = 949.78/x
  3. Step 3: Cross multiply
    1,386.73x = 2,080.50 × 949.78
  4. Step 4: Simplify right side
    1,386.73x = 1,976,017.29
  5. Step 5: Solve for x
    x = 1,976,017.29/1,386.73
  6. Step 6: Final answer
    x = 1,424.95

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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.