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Finding the Fourth Proportional to 168.84, 253.38 and 156.15

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Solution

The fourth proportional to 168.84, 253.38 and 156.15 is: 234.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    168.84 : 253.38 = 156.15 : x
  2. Step 2: Convert to fraction form
    168.84/253.38 = 156.15/x
  3. Step 3: Cross multiply
    168.84x = 253.38 × 156.15
  4. Step 4: Simplify right side
    168.84x = 39,565.29
  5. Step 5: Solve for x
    x = 39,565.29/168.84
  6. Step 6: Final answer
    x = 234.34

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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.