Home / 1,081.25-1,621.87-350.90

Finding the Fourth Proportional to 1,081.25, 1,621.87 and 350.90

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Solution

The fourth proportional to 1,081.25, 1,621.87 and 350.90 is: 526.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,081.25 : 1,621.87 = 350.90 : x
  2. Step 2: Convert to fraction form
    1,081.25/1,621.87 = 350.90/x
  3. Step 3: Cross multiply
    1,081.25x = 1,621.87 × 350.90
  4. Step 4: Simplify right side
    1,081.25x = 569,105.20
  5. Step 5: Solve for x
    x = 569,105.20/1,081.25
  6. Step 6: Final answer
    x = 526.34

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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.