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Finding the Fourth Proportional to 287.24, 431.20 and 150.35

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Solution

The fourth proportional to 287.24, 431.20 and 150.35 is: 225.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    287.24 : 431.20 = 150.35 : x
  2. Step 2: Convert to fraction form
    287.24/431.20 = 150.35/x
  3. Step 3: Cross multiply
    287.24x = 431.20 × 150.35
  4. Step 4: Simplify right side
    287.24x = 64,832.19
  5. Step 5: Solve for x
    x = 64,832.19/287.24
  6. Step 6: Final answer
    x = 225.71

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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.