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Finding the Fourth Proportional to 287.65, 432.42 and 236.67

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Solution

The fourth proportional to 287.65, 432.42 and 236.67 is: 355.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    287.65 : 432.42 = 236.67 : x
  2. Step 2: Convert to fraction form
    287.65/432.42 = 236.67/x
  3. Step 3: Cross multiply
    287.65x = 432.42 × 236.67
  4. Step 4: Simplify right side
    287.65x = 102,338.68
  5. Step 5: Solve for x
    x = 102,338.68/287.65
  6. Step 6: Final answer
    x = 355.78

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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.