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Finding the Fourth Proportional to 3,281.90, 4,922.78 and 1,090.65

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Solution

The fourth proportional to 3,281.90, 4,922.78 and 1,090.65 is: 1,635.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,281.90 : 4,922.78 = 1,090.65 : x
  2. Step 2: Convert to fraction form
    3,281.90/4,922.78 = 1,090.65/x
  3. Step 3: Cross multiply
    3,281.90x = 4,922.78 × 1,090.65
  4. Step 4: Simplify right side
    3,281.90x = 5,368,999.94
  5. Step 5: Solve for x
    x = 5,368,999.94/3,281.90
  6. Step 6: Final answer
    x = 1,635.95

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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.