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Finding the Fourth Proportional to 217.40, 300.02 and 117.82

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Solution

The fourth proportional to 217.40, 300.02 and 117.82 is: 162.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    217.40 : 300.02 = 117.82 : x
  2. Step 2: Convert to fraction form
    217.40/300.02 = 117.82/x
  3. Step 3: Cross multiply
    217.40x = 300.02 × 117.82
  4. Step 4: Simplify right side
    217.40x = 35,347.77
  5. Step 5: Solve for x
    x = 35,347.77/217.40
  6. Step 6: Final answer
    x = 162.59

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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.