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Finding the Fourth Proportional to 467.80, 645.56 and 281.29

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Solution

The fourth proportional to 467.80, 645.56 and 281.29 is: 388.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    467.80 : 645.56 = 281.29 : x
  2. Step 2: Convert to fraction form
    467.80/645.56 = 281.29/x
  3. Step 3: Cross multiply
    467.80x = 645.56 × 281.29
  4. Step 4: Simplify right side
    467.80x = 181,589.57
  5. Step 5: Solve for x
    x = 181,589.57/467.80
  6. Step 6: Final answer
    x = 388.18

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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.