Home / 1,538.10-2,122.52-839.46

Finding the Fourth Proportional to 1,538.10, 2,122.52 and 839.46

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Solution

The fourth proportional to 1,538.10, 2,122.52 and 839.46 is: 1,158.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,538.10 : 2,122.52 = 839.46 : x
  2. Step 2: Convert to fraction form
    1,538.10/2,122.52 = 839.46/x
  3. Step 3: Cross multiply
    1,538.10x = 2,122.52 × 839.46
  4. Step 4: Simplify right side
    1,538.10x = 1,781,766.44
  5. Step 5: Solve for x
    x = 1,781,766.44/1,538.10
  6. Step 6: Final answer
    x = 1,158.42

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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.