Home / 1,540.11-2,125.38-841.53

Finding the Fourth Proportional to 1,540.11, 2,125.38 and 841.53

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Solution

The fourth proportional to 1,540.11, 2,125.38 and 841.53 is: 1,161.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,540.11 : 2,125.38 = 841.53 : x
  2. Step 2: Convert to fraction form
    1,540.11/2,125.38 = 841.53/x
  3. Step 3: Cross multiply
    1,540.11x = 2,125.38 × 841.53
  4. Step 4: Simplify right side
    1,540.11x = 1,788,571.03
  5. Step 5: Solve for x
    x = 1,788,571.03/1,540.11
  6. Step 6: Final answer
    x = 1,161.33

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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.