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Finding the Fourth Proportional to 254.82, 351.66 and 156.60

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Solution

The fourth proportional to 254.82, 351.66 and 156.60 is: 216.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    254.82 : 351.66 = 156.60 : x
  2. Step 2: Convert to fraction form
    254.82/351.66 = 156.60/x
  3. Step 3: Cross multiply
    254.82x = 351.66 × 156.60
  4. Step 4: Simplify right side
    254.82x = 55,070.54
  5. Step 5: Solve for x
    x = 55,070.54/254.82
  6. Step 6: Final answer
    x = 216.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.