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Finding the Fourth Proportional to 889.62, 1,332.65 and 443.54

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Solution

The fourth proportional to 889.62, 1,332.65 and 443.54 is: 664.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.62 : 1,332.65 = 443.54 : x
  2. Step 2: Convert to fraction form
    889.62/1,332.65 = 443.54/x
  3. Step 3: Cross multiply
    889.62x = 1,332.65 × 443.54
  4. Step 4: Simplify right side
    889.62x = 591,086.91
  5. Step 5: Solve for x
    x = 591,086.91/889.62
  6. Step 6: Final answer
    x = 664.42

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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.