Home / 1,081.31-1,621.68-351.09

Finding the Fourth Proportional to 1,081.31, 1,621.68 and 351.09

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Solution

The fourth proportional to 1,081.31, 1,621.68 and 351.09 is: 526.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,081.31 : 1,621.68 = 351.09 : x
  2. Step 2: Convert to fraction form
    1,081.31/1,621.68 = 351.09/x
  3. Step 3: Cross multiply
    1,081.31x = 1,621.68 × 351.09
  4. Step 4: Simplify right side
    1,081.31x = 569,355.63
  5. Step 5: Solve for x
    x = 569,355.63/1,081.31
  6. Step 6: Final answer
    x = 526.54

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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.