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Finding the Fourth Proportional to 467.64, 645.61 and 281.18

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Solution

The fourth proportional to 467.64, 645.61 and 281.18 is: 388.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    467.64 : 645.61 = 281.18 : x
  2. Step 2: Convert to fraction form
    467.64/645.61 = 281.18/x
  3. Step 3: Cross multiply
    467.64x = 645.61 × 281.18
  4. Step 4: Simplify right side
    467.64x = 181,531.85
  5. Step 5: Solve for x
    x = 181,531.85/467.64
  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.