Home / 1,385.90-2,077.81-837.97

Finding the Fourth Proportional to 1,385.90, 2,077.81 and 837.97

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Solution

The fourth proportional to 1,385.90, 2,077.81 and 837.97 is: 1,256.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,385.90 : 2,077.81 = 837.97 : x
  2. Step 2: Convert to fraction form
    1,385.90/2,077.81 = 837.97/x
  3. Step 3: Cross multiply
    1,385.90x = 2,077.81 × 837.97
  4. Step 4: Simplify right side
    1,385.90x = 1,741,142.45
  5. Step 5: Solve for x
    x = 1,741,142.45/1,385.90
  6. Step 6: Final answer
    x = 1,256.33

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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.