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Finding the Fourth Proportional to 398.45, 597.78 and 167.47

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Solution

The fourth proportional to 398.45, 597.78 and 167.47 is: 251.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    398.45 : 597.78 = 167.47 : x
  2. Step 2: Convert to fraction form
    398.45/597.78 = 167.47/x
  3. Step 3: Cross multiply
    398.45x = 597.78 × 167.47
  4. Step 4: Simplify right side
    398.45x = 100,108.72
  5. Step 5: Solve for x
    x = 100,108.72/398.45
  6. Step 6: Final answer
    x = 251.24

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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.