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Finding the Fourth Proportional to 288.13, 397.52 and 251.23

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Solution

The fourth proportional to 288.13, 397.52 and 251.23 is: 346.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.13 : 397.52 = 251.23 : x
  2. Step 2: Convert to fraction form
    288.13/397.52 = 251.23/x
  3. Step 3: Cross multiply
    288.13x = 397.52 × 251.23
  4. Step 4: Simplify right side
    288.13x = 99,868.58
  5. Step 5: Solve for x
    x = 99,868.58/288.13
  6. Step 6: Final answer
    x = 346.61

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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.