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Finding the Fourth Proportional to 881.01, 1,321.47 and 447.75

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Solution

The fourth proportional to 881.01, 1,321.47 and 447.75 is: 671.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    881.01 : 1,321.47 = 447.75 : x
  2. Step 2: Convert to fraction form
    881.01/1,321.47 = 447.75/x
  3. Step 3: Cross multiply
    881.01x = 1,321.47 × 447.75
  4. Step 4: Simplify right side
    881.01x = 591,688.19
  5. Step 5: Solve for x
    x = 591,688.19/881.01
  6. Step 6: Final answer
    x = 671.60

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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.