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Finding the Fourth Proportional to 1,657.03, 2,286.69 and 911

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Solution

The fourth proportional to 1,657.03, 2,286.69 and 911 is: 1,257.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,657.03 : 2,286.69 = 911 : x
  2. Step 2: Convert to fraction form
    1,657.03/2,286.69 = 911/x
  3. Step 3: Cross multiply
    1,657.03x = 2,286.69 × 911
  4. Step 4: Simplify right side
    1,657.03x = 2,083,174.59
  5. Step 5: Solve for x
    x = 2,083,174.59/1,657.03
  6. Step 6: Final answer
    x = 1,257.17

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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.