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Finding the Fourth Proportional to 398.54, 598.53 and 381.53

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Solution

The fourth proportional to 398.54, 598.53 and 381.53 is: 572.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    398.54 : 598.53 = 381.53 : x
  2. Step 2: Convert to fraction form
    398.54/598.53 = 381.53/x
  3. Step 3: Cross multiply
    398.54x = 598.53 × 381.53
  4. Step 4: Simplify right side
    398.54x = 228,357.15
  5. Step 5: Solve for x
    x = 228,357.15/398.54
  6. Step 6: Final answer
    x = 572.98

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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.