Home / 1,123.78-1,551.58-1,049.90

Finding the Fourth Proportional to 1,123.78, 1,551.58 and 1,049.90

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Solution

The fourth proportional to 1,123.78, 1,551.58 and 1,049.90 is: 1,449.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,123.78 : 1,551.58 = 1,049.90 : x
  2. Step 2: Convert to fraction form
    1,123.78/1,551.58 = 1,049.90/x
  3. Step 3: Cross multiply
    1,123.78x = 1,551.58 × 1,049.90
  4. Step 4: Simplify right side
    1,123.78x = 1,629,003.84
  5. Step 5: Solve for x
    x = 1,629,003.84/1,123.78
  6. Step 6: Final answer
    x = 1,449.58

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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.