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Finding the Fourth Proportional to 288.06, 431.63 and 211.07

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Solution

The fourth proportional to 288.06, 431.63 and 211.07 is: 316.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.06 : 431.63 = 211.07 : x
  2. Step 2: Convert to fraction form
    288.06/431.63 = 211.07/x
  3. Step 3: Cross multiply
    288.06x = 431.63 × 211.07
  4. Step 4: Simplify right side
    288.06x = 91,104.96
  5. Step 5: Solve for x
    x = 91,104.96/288.06
  6. Step 6: Final answer
    x = 316.27

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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.