Home / 1,911.35-2,638.22-1,248.30

Finding the Fourth Proportional to 1,911.35, 2,638.22 and 1,248.30

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Solution

The fourth proportional to 1,911.35, 2,638.22 and 1,248.30 is: 1,723.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,911.35 : 2,638.22 = 1,248.30 : x
  2. Step 2: Convert to fraction form
    1,911.35/2,638.22 = 1,248.30/x
  3. Step 3: Cross multiply
    1,911.35x = 2,638.22 × 1,248.30
  4. Step 4: Simplify right side
    1,911.35x = 3,293,290.03
  5. Step 5: Solve for x
    x = 3,293,290.03/1,911.35
  6. Step 6: Final answer
    x = 1,723.02

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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.