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Finding the Fourth Proportional to 884.78, 1,327.20 and 235.64

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Solution

The fourth proportional to 884.78, 1,327.20 and 235.64 is: 353.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    884.78 : 1,327.20 = 235.64 : x
  2. Step 2: Convert to fraction form
    884.78/1,327.20 = 235.64/x
  3. Step 3: Cross multiply
    884.78x = 1,327.20 × 235.64
  4. Step 4: Simplify right side
    884.78x = 312,741.41
  5. Step 5: Solve for x
    x = 312,741.41/884.78
  6. Step 6: Final answer
    x = 353.47

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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.