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Finding the Fourth Proportional to 201.16, 302.87 and 140.70

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Solution

The fourth proportional to 201.16, 302.87 and 140.70 is: 211.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.16 : 302.87 = 140.70 : x
  2. Step 2: Convert to fraction form
    201.16/302.87 = 140.70/x
  3. Step 3: Cross multiply
    201.16x = 302.87 × 140.70
  4. Step 4: Simplify right side
    201.16x = 42,613.81
  5. Step 5: Solve for x
    x = 42,613.81/201.16
  6. Step 6: Final answer
    x = 211.84

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.