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Finding the Fourth Proportional to 259.43, 357.86 and 154.45

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Solution

The fourth proportional to 259.43, 357.86 and 154.45 is: 213.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.43 : 357.86 = 154.45 : x
  2. Step 2: Convert to fraction form
    259.43/357.86 = 154.45/x
  3. Step 3: Cross multiply
    259.43x = 357.86 × 154.45
  4. Step 4: Simplify right side
    259.43x = 55,270.44
  5. Step 5: Solve for x
    x = 55,270.44/259.43
  6. Step 6: Final answer
    x = 213.05

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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.