Home / 1,081.31-1,621.39-350.80

Finding the Fourth Proportional to 1,081.31, 1,621.39 and 350.80

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Solution

The fourth proportional to 1,081.31, 1,621.39 and 350.80 is: 526.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,081.31 : 1,621.39 = 350.80 : x
  2. Step 2: Convert to fraction form
    1,081.31/1,621.39 = 350.80/x
  3. Step 3: Cross multiply
    1,081.31x = 1,621.39 × 350.80
  4. Step 4: Simplify right side
    1,081.31x = 568,783.61
  5. Step 5: Solve for x
    x = 568,783.61/1,081.31
  6. Step 6: Final answer
    x = 526.01

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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.