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Finding the Fourth Proportional to 2,291.82, 3,437.90 and 1,122.81

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Solution

The fourth proportional to 2,291.82, 3,437.90 and 1,122.81 is: 1,684.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,291.82 : 3,437.90 = 1,122.81 : x
  2. Step 2: Convert to fraction form
    2,291.82/3,437.90 = 1,122.81/x
  3. Step 3: Cross multiply
    2,291.82x = 3,437.90 × 1,122.81
  4. Step 4: Simplify right side
    2,291.82x = 3,860,091.31
  5. Step 5: Solve for x
    x = 3,860,091.31/2,291.82
  6. Step 6: Final answer
    x = 1,684.29

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.