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Finding the Fourth Proportional to 467.88, 645.78 and 281.48

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Solution

The fourth proportional to 467.88, 645.78 and 281.48 is: 388.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    467.88 : 645.78 = 281.48 : x
  2. Step 2: Convert to fraction form
    467.88/645.78 = 281.48/x
  3. Step 3: Cross multiply
    467.88x = 645.78 × 281.48
  4. Step 4: Simplify right side
    467.88x = 181,770.93
  5. Step 5: Solve for x
    x = 181,770.93/467.88
  6. Step 6: Final answer
    x = 388.50

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.