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Finding the Fourth Proportional to 288.07, 397.55 and 171.63

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Solution

The fourth proportional to 288.07, 397.55 and 171.63 is: 236.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.07 : 397.55 = 171.63 : x
  2. Step 2: Convert to fraction form
    288.07/397.55 = 171.63/x
  3. Step 3: Cross multiply
    288.07x = 397.55 × 171.63
  4. Step 4: Simplify right side
    288.07x = 68,231.51
  5. Step 5: Solve for x
    x = 68,231.51/288.07
  6. Step 6: Final answer
    x = 236.86

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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.