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Finding the Fourth Proportional to 3,486.21, 5,229.59 and 889.13

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Solution

The fourth proportional to 3,486.21, 5,229.59 and 889.13 is: 1,333.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,486.21 : 5,229.59 = 889.13 : x
  2. Step 2: Convert to fraction form
    3,486.21/5,229.59 = 889.13/x
  3. Step 3: Cross multiply
    3,486.21x = 5,229.59 × 889.13
  4. Step 4: Simplify right side
    3,486.21x = 4,649,754.76
  5. Step 5: Solve for x
    x = 4,649,754.76/3,486.21
  6. Step 6: Final answer
    x = 1,333.76

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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.