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Finding the Fourth Proportional to 254.99, 351.94 and 156.85

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Solution

The fourth proportional to 254.99, 351.94 and 156.85 is: 216.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    254.99 : 351.94 = 156.85 : x
  2. Step 2: Convert to fraction form
    254.99/351.94 = 156.85/x
  3. Step 3: Cross multiply
    254.99x = 351.94 × 156.85
  4. Step 4: Simplify right side
    254.99x = 55,201.79
  5. Step 5: Solve for x
    x = 55,201.79/254.99
  6. Step 6: Final answer
    x = 216.49

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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.