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Finding the Fourth Proportional to 3,221.40, 4,832.10 and 881.40

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Solution

The fourth proportional to 3,221.40, 4,832.10 and 881.40 is: 1,322.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,221.40 : 4,832.10 = 881.40 : x
  2. Step 2: Convert to fraction form
    3,221.40/4,832.10 = 881.40/x
  3. Step 3: Cross multiply
    3,221.40x = 4,832.10 × 881.40
  4. Step 4: Simplify right side
    3,221.40x = 4,259,012.94
  5. Step 5: Solve for x
    x = 4,259,012.94/3,221.40
  6. Step 6: Final answer
    x = 1,322.10

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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.