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Finding the Fourth Proportional to 288.30, 397.81 and 249.01

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Solution

The fourth proportional to 288.30, 397.81 and 249.01 is: 343.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.30 : 397.81 = 249.01 : x
  2. Step 2: Convert to fraction form
    288.30/397.81 = 249.01/x
  3. Step 3: Cross multiply
    288.30x = 397.81 × 249.01
  4. Step 4: Simplify right side
    288.30x = 99,058.67
  5. Step 5: Solve for x
    x = 99,058.67/288.30
  6. Step 6: Final answer
    x = 343.60

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.