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Finding the Fourth Proportional to 1,081.74, 1,621.56 and 350.88

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Solution

The fourth proportional to 1,081.74, 1,621.56 and 350.88 is: 525.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,081.74 : 1,621.56 = 350.88 : x
  2. Step 2: Convert to fraction form
    1,081.74/1,621.56 = 350.88/x
  3. Step 3: Cross multiply
    1,081.74x = 1,621.56 × 350.88
  4. Step 4: Simplify right side
    1,081.74x = 568,972.97
  5. Step 5: Solve for x
    x = 568,972.97/1,081.74
  6. Step 6: Final answer
    x = 525.98

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1.5x scale

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.