Home / 1,386.05-2,078.27-837.91

Finding the Fourth Proportional to 1,386.05, 2,078.27 and 837.91

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Solution

The fourth proportional to 1,386.05, 2,078.27 and 837.91 is: 1,256.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,386.05 : 2,078.27 = 837.91 : x
  2. Step 2: Convert to fraction form
    1,386.05/2,078.27 = 837.91/x
  3. Step 3: Cross multiply
    1,386.05x = 2,078.27 × 837.91
  4. Step 4: Simplify right side
    1,386.05x = 1,741,396.97
  5. Step 5: Solve for x
    x = 1,741,396.97/1,386.05
  6. Step 6: Final answer
    x = 1,256.37

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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.