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Finding the Fourth Proportional to 241.70, 360.70 and 212.81

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Solution

The fourth proportional to 241.70, 360.70 and 212.81 is: 317.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    241.70 : 360.70 = 212.81 : x
  2. Step 2: Convert to fraction form
    241.70/360.70 = 212.81/x
  3. Step 3: Cross multiply
    241.70x = 360.70 × 212.81
  4. Step 4: Simplify right side
    241.70x = 76,758.23
  5. Step 5: Solve for x
    x = 76,758.23/241.70
  6. Step 6: Final answer
    x = 317.58

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.