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Finding the Fourth Proportional to 889.11, 1,333.80 and 272.79

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Solution

The fourth proportional to 889.11, 1,333.80 and 272.79 is: 409.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.11 : 1,333.80 = 272.79 : x
  2. Step 2: Convert to fraction form
    889.11/1,333.80 = 272.79/x
  3. Step 3: Cross multiply
    889.11x = 1,333.80 × 272.79
  4. Step 4: Simplify right side
    889.11x = 363,847.30
  5. Step 5: Solve for x
    x = 363,847.30/889.11
  6. Step 6: Final answer
    x = 409.23

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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.