Home / 1,122.20-1,548.46-656.44

Finding the Fourth Proportional to 1,122.20, 1,548.46 and 656.44

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Solution

The fourth proportional to 1,122.20, 1,548.46 and 656.44 is: 905.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,122.20 : 1,548.46 = 656.44 : x
  2. Step 2: Convert to fraction form
    1,122.20/1,548.46 = 656.44/x
  3. Step 3: Cross multiply
    1,122.20x = 1,548.46 × 656.44
  4. Step 4: Simplify right side
    1,122.20x = 1,016,471.08
  5. Step 5: Solve for x
    x = 1,016,471.08/1,122.20
  6. Step 6: Final answer
    x = 905.78

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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.