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Finding the Fourth Proportional to 398.57, 598.08 and 193.19

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Solution

The fourth proportional to 398.57, 598.08 and 193.19 is: 289.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    398.57 : 598.08 = 193.19 : x
  2. Step 2: Convert to fraction form
    398.57/598.08 = 193.19/x
  3. Step 3: Cross multiply
    398.57x = 598.08 × 193.19
  4. Step 4: Simplify right side
    398.57x = 115,540.81
  5. Step 5: Solve for x
    x = 115,540.81/398.57
  6. Step 6: Final answer
    x = 289.89

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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.