Home / 1,910.30-2,636.96-1,387.85

Finding the Fourth Proportional to 1,910.30, 2,636.96 and 1,387.85

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Solution

The fourth proportional to 1,910.30, 2,636.96 and 1,387.85 is: 1,915.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,910.30 : 2,636.96 = 1,387.85 : x
  2. Step 2: Convert to fraction form
    1,910.30/2,636.96 = 1,387.85/x
  3. Step 3: Cross multiply
    1,910.30x = 2,636.96 × 1,387.85
  4. Step 4: Simplify right side
    1,910.30x = 3,659,684.81
  5. Step 5: Solve for x
    x = 3,659,684.81/1,910.30
  6. Step 6: Final answer
    x = 1,915.77

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.