Home / 1,239.72-1,849.97-1,108.28

Finding the Fourth Proportional to 1,239.72, 1,849.97 and 1,108.28

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Solution

The fourth proportional to 1,239.72, 1,849.97 and 1,108.28 is: 1,653.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,239.72 : 1,849.97 = 1,108.28 : x
  2. Step 2: Convert to fraction form
    1,239.72/1,849.97 = 1,108.28/x
  3. Step 3: Cross multiply
    1,239.72x = 1,849.97 × 1,108.28
  4. Step 4: Simplify right side
    1,239.72x = 2,050,284.75
  5. Step 5: Solve for x
    x = 2,050,284.75/1,239.72
  6. Step 6: Final answer
    x = 1,653.83

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.