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Finding the Fourth Proportional to 397.07, 595.31 and 191.45

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Solution

The fourth proportional to 397.07, 595.31 and 191.45 is: 287.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    397.07 : 595.31 = 191.45 : x
  2. Step 2: Convert to fraction form
    397.07/595.31 = 191.45/x
  3. Step 3: Cross multiply
    397.07x = 595.31 × 191.45
  4. Step 4: Simplify right side
    397.07x = 113,969.12
  5. Step 5: Solve for x
    x = 113,969.12/397.07
  6. Step 6: Final answer
    x = 287.03

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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.