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Finding the Fourth Proportional to 3,351.65, 5,027.45 and 1,405.22

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Solution

The fourth proportional to 3,351.65, 5,027.45 and 1,405.22 is: 2,107.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,351.65 : 5,027.45 = 1,405.22 : x
  2. Step 2: Convert to fraction form
    3,351.65/5,027.45 = 1,405.22/x
  3. Step 3: Cross multiply
    3,351.65x = 5,027.45 × 1,405.22
  4. Step 4: Simplify right side
    3,351.65x = 7,064,641.13
  5. Step 5: Solve for x
    x = 7,064,641.13/3,351.65
  6. Step 6: Final answer
    x = 2,107.81

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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.