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Finding the Fourth Proportional to 288.24, 397.71 and 188.61

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Solution

The fourth proportional to 288.24, 397.71 and 188.61 is: 260.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.24 : 397.71 = 188.61 : x
  2. Step 2: Convert to fraction form
    288.24/397.71 = 188.61/x
  3. Step 3: Cross multiply
    288.24x = 397.71 × 188.61
  4. Step 4: Simplify right side
    288.24x = 75,010.59
  5. Step 5: Solve for x
    x = 75,010.59/288.24
  6. Step 6: Final answer
    x = 260.24

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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.