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Finding the Fourth Proportional to 398.94, 598.53 and 193.62

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Solution

The fourth proportional to 398.94, 598.53 and 193.62 is: 290.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    398.94 : 598.53 = 193.62 : x
  2. Step 2: Convert to fraction form
    398.94/598.53 = 193.62/x
  3. Step 3: Cross multiply
    398.94x = 598.53 × 193.62
  4. Step 4: Simplify right side
    398.94x = 115,887.38
  5. Step 5: Solve for x
    x = 115,887.38/398.94
  6. Step 6: Final answer
    x = 290.49

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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.