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Finding the Fourth Proportional to 212.32, 293.18 and 159.77

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Solution

The fourth proportional to 212.32, 293.18 and 159.77 is: 220.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    212.32 : 293.18 = 159.77 : x
  2. Step 2: Convert to fraction form
    212.32/293.18 = 159.77/x
  3. Step 3: Cross multiply
    212.32x = 293.18 × 159.77
  4. Step 4: Simplify right side
    212.32x = 46,841.56
  5. Step 5: Solve for x
    x = 46,841.56/212.32
  6. Step 6: Final answer
    x = 220.62

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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.