Home / 1,910.90-2,638.19-1,248.86

Finding the Fourth Proportional to 1,910.90, 2,638.19 and 1,248.86

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Solution

The fourth proportional to 1,910.90, 2,638.19 and 1,248.86 is: 1,724.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,910.90 : 2,638.19 = 1,248.86 : x
  2. Step 2: Convert to fraction form
    1,910.90/2,638.19 = 1,248.86/x
  3. Step 3: Cross multiply
    1,910.90x = 2,638.19 × 1,248.86
  4. Step 4: Simplify right side
    1,910.90x = 3,294,729.96
  5. Step 5: Solve for x
    x = 3,294,729.96/1,910.90
  6. Step 6: Final answer
    x = 1,724.18

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1.5x scale

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.