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Finding the Fourth Proportional to 889.05, 1,333.60 and 239.78

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Solution

The fourth proportional to 889.05, 1,333.60 and 239.78 is: 359.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    889.05 : 1,333.60 = 239.78 : x
  2. Step 2: Convert to fraction form
    889.05/1,333.60 = 239.78/x
  3. Step 3: Cross multiply
    889.05x = 1,333.60 × 239.78
  4. Step 4: Simplify right side
    889.05x = 319,770.61
  5. Step 5: Solve for x
    x = 319,770.61/889.05
  6. Step 6: Final answer
    x = 359.68

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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.