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Finding the Fourth Proportional to 259.11, 357.67 and 155.61

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Solution

The fourth proportional to 259.11, 357.67 and 155.61 is: 214.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.11 : 357.67 = 155.61 : x
  2. Step 2: Convert to fraction form
    259.11/357.67 = 155.61/x
  3. Step 3: Cross multiply
    259.11x = 357.67 × 155.61
  4. Step 4: Simplify right side
    259.11x = 55,657.03
  5. Step 5: Solve for x
    x = 55,657.03/259.11
  6. Step 6: Final answer
    x = 214.80

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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.