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Finding the Fourth Proportional to 398.07, 597.42 and 192.69

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Solution

The fourth proportional to 398.07, 597.42 and 192.69 is: 289.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    398.07 : 597.42 = 192.69 : x
  2. Step 2: Convert to fraction form
    398.07/597.42 = 192.69/x
  3. Step 3: Cross multiply
    398.07x = 597.42 × 192.69
  4. Step 4: Simplify right side
    398.07x = 115,116.86
  5. Step 5: Solve for x
    x = 115,116.86/398.07
  6. Step 6: Final answer
    x = 289.19

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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.