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Finding the Fourth Proportional to 397.26, 596.79 and 287.91

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Solution

The fourth proportional to 397.26, 596.79 and 287.91 is: 432.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    397.26 : 596.79 = 287.91 : x
  2. Step 2: Convert to fraction form
    397.26/596.79 = 287.91/x
  3. Step 3: Cross multiply
    397.26x = 596.79 × 287.91
  4. Step 4: Simplify right side
    397.26x = 171,821.81
  5. Step 5: Solve for x
    x = 171,821.81/397.26
  6. Step 6: Final answer
    x = 432.52

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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.