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Finding the Fourth Proportional to 259.11, 357.81 and 160.90

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Solution

The fourth proportional to 259.11, 357.81 and 160.90 is: 222.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.11 : 357.81 = 160.90 : x
  2. Step 2: Convert to fraction form
    259.11/357.81 = 160.90/x
  3. Step 3: Cross multiply
    259.11x = 357.81 × 160.90
  4. Step 4: Simplify right side
    259.11x = 57,571.63
  5. Step 5: Solve for x
    x = 57,571.63/259.11
  6. Step 6: Final answer
    x = 222.19

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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.