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Finding the Fourth Proportional to 259.16, 357.68 and 217.64

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Solution

The fourth proportional to 259.16, 357.68 and 217.64 is: 300.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.16 : 357.68 = 217.64 : x
  2. Step 2: Convert to fraction form
    259.16/357.68 = 217.64/x
  3. Step 3: Cross multiply
    259.16x = 357.68 × 217.64
  4. Step 4: Simplify right side
    259.16x = 77,845.48
  5. Step 5: Solve for x
    x = 77,845.48/259.16
  6. Step 6: Final answer
    x = 300.38

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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.