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Finding the Fourth Proportional to 1,049.15, 1,448.43 and 855.06

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Solution

The fourth proportional to 1,049.15, 1,448.43 and 855.06 is: 1,180.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,049.15 : 1,448.43 = 855.06 : x
  2. Step 2: Convert to fraction form
    1,049.15/1,448.43 = 855.06/x
  3. Step 3: Cross multiply
    1,049.15x = 1,448.43 × 855.06
  4. Step 4: Simplify right side
    1,049.15x = 1,238,490.73
  5. Step 5: Solve for x
    x = 1,238,490.73/1,049.15
  6. Step 6: Final answer
    x = 1,180.47

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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.