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Finding the Fourth Proportional to 288.72, 433.31 and 106.25

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Solution

The fourth proportional to 288.72, 433.31 and 106.25 is: 159.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    288.72 : 433.31 = 106.25 : x
  2. Step 2: Convert to fraction form
    288.72/433.31 = 106.25/x
  3. Step 3: Cross multiply
    288.72x = 433.31 × 106.25
  4. Step 4: Simplify right side
    288.72x = 46,039.19
  5. Step 5: Solve for x
    x = 46,039.19/288.72
  6. Step 6: Final answer
    x = 159.46

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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.