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Finding the Fourth Proportional to 287.73, 431.33 and 150.87

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Solution

The fourth proportional to 287.73, 431.33 and 150.87 is: 226.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    287.73 : 431.33 = 150.87 : x
  2. Step 2: Convert to fraction form
    287.73/431.33 = 150.87/x
  3. Step 3: Cross multiply
    287.73x = 431.33 × 150.87
  4. Step 4: Simplify right side
    287.73x = 65,071.85
  5. Step 5: Solve for x
    x = 65,071.85/287.73
  6. Step 6: Final answer
    x = 226.16

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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.