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Finding the Fourth Proportional to 397.06, 595.37 and 287.42

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Solution

The fourth proportional to 397.06, 595.37 and 287.42 is: 430.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    397.06 : 595.37 = 287.42 : x
  2. Step 2: Convert to fraction form
    397.06/595.37 = 287.42/x
  3. Step 3: Cross multiply
    397.06x = 595.37 × 287.42
  4. Step 4: Simplify right side
    397.06x = 171,121.25
  5. Step 5: Solve for x
    x = 171,121.25/397.06
  6. Step 6: Final answer
    x = 430.97

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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.