Home / 3,386.91-5,078.49-1,387.01

Finding the Fourth Proportional to 3,386.91, 5,078.49 and 1,387.01

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Solution

The fourth proportional to 3,386.91, 5,078.49 and 1,387.01 is: 2,079.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,386.91 : 5,078.49 = 1,387.01 : x
  2. Step 2: Convert to fraction form
    3,386.91/5,078.49 = 1,387.01/x
  3. Step 3: Cross multiply
    3,386.91x = 5,078.49 × 1,387.01
  4. Step 4: Simplify right side
    3,386.91x = 7,043,884.09
  5. Step 5: Solve for x
    x = 7,043,884.09/3,386.91
  6. Step 6: Final answer
    x = 2,079.74

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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.