Home / 1,255.07-1,732.87-1,121.89

Finding the Fourth Proportional to 1,255.07, 1,732.87 and 1,121.89

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Solution

The fourth proportional to 1,255.07, 1,732.87 and 1,121.89 is: 1,548.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,255.07 : 1,732.87 = 1,121.89 : x
  2. Step 2: Convert to fraction form
    1,255.07/1,732.87 = 1,121.89/x
  3. Step 3: Cross multiply
    1,255.07x = 1,732.87 × 1,121.89
  4. Step 4: Simplify right side
    1,255.07x = 1,944,082.39
  5. Step 5: Solve for x
    x = 1,944,082.39/1,255.07
  6. Step 6: Final answer
    x = 1,548.98

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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.