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Finding the Fourth Proportional to 287.98, 432.72 and 166.35

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Solution

The fourth proportional to 287.98, 432.72 and 166.35 is: 249.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    287.98 : 432.72 = 166.35 : x
  2. Step 2: Convert to fraction form
    287.98/432.72 = 166.35/x
  3. Step 3: Cross multiply
    287.98x = 432.72 × 166.35
  4. Step 4: Simplify right side
    287.98x = 71,982.97
  5. Step 5: Solve for x
    x = 71,982.97/287.98
  6. Step 6: Final answer
    x = 249.96

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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.