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Finding the Fourth Proportional to 397.39, 595.80 and 191.74

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Solution

The fourth proportional to 397.39, 595.80 and 191.74 is: 287.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    397.39 : 595.80 = 191.74 : x
  2. Step 2: Convert to fraction form
    397.39/595.80 = 191.74/x
  3. Step 3: Cross multiply
    397.39x = 595.80 × 191.74
  4. Step 4: Simplify right side
    397.39x = 114,238.69
  5. Step 5: Solve for x
    x = 114,238.69/397.39
  6. Step 6: Final answer
    x = 287.47

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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.