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Finding the Fourth Proportional to 398.86, 549.93 and 324.97

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Solution

The fourth proportional to 398.86, 549.93 and 324.97 is: 448.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    398.86 : 549.93 = 324.97 : x
  2. Step 2: Convert to fraction form
    398.86/549.93 = 324.97/x
  3. Step 3: Cross multiply
    398.86x = 549.93 × 324.97
  4. Step 4: Simplify right side
    398.86x = 178,710.75
  5. Step 5: Solve for x
    x = 178,710.75/398.86
  6. Step 6: Final answer
    x = 448.05

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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.