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Finding the Fourth Proportional to 259.23, 357.79 and 170.56

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Solution

The fourth proportional to 259.23, 357.79 and 170.56 is: 235.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.23 : 357.79 = 170.56 : x
  2. Step 2: Convert to fraction form
    259.23/357.79 = 170.56/x
  3. Step 3: Cross multiply
    259.23x = 357.79 × 170.56
  4. Step 4: Simplify right side
    259.23x = 61,022.45
  5. Step 5: Solve for x
    x = 61,022.45/259.23
  6. Step 6: Final answer
    x = 235.40

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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.