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Finding the Fourth Proportional to 259.62, 358.79 and 212.92

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Solution

The fourth proportional to 259.62, 358.79 and 212.92 is: 294.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.62 : 358.79 = 212.92 : x
  2. Step 2: Convert to fraction form
    259.62/358.79 = 212.92/x
  3. Step 3: Cross multiply
    259.62x = 358.79 × 212.92
  4. Step 4: Simplify right side
    259.62x = 76,393.57
  5. Step 5: Solve for x
    x = 76,393.57/259.62
  6. Step 6: Final answer
    x = 294.25

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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.