Home / 1,909.68-2,635.38-1,081.68

Finding the Fourth Proportional to 1,909.68, 2,635.38 and 1,081.68

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Solution

The fourth proportional to 1,909.68, 2,635.38 and 1,081.68 is: 1,492.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,909.68 : 2,635.38 = 1,081.68 : x
  2. Step 2: Convert to fraction form
    1,909.68/2,635.38 = 1,081.68/x
  3. Step 3: Cross multiply
    1,909.68x = 2,635.38 × 1,081.68
  4. Step 4: Simplify right side
    1,909.68x = 2,850,637.84
  5. Step 5: Solve for x
    x = 2,850,637.84/1,909.68
  6. Step 6: Final answer
    x = 1,492.73

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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.