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Finding the Fourth Proportional to 201.69, 302.00 and 140.72

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Solution

The fourth proportional to 201.69, 302.00 and 140.72 is: 210.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.69 : 302.00 = 140.72 : x
  2. Step 2: Convert to fraction form
    201.69/302.00 = 140.72/x
  3. Step 3: Cross multiply
    201.69x = 302.00 × 140.72
  4. Step 4: Simplify right side
    201.69x = 42,495.23
  5. Step 5: Solve for x
    x = 42,495.23/201.69
  6. Step 6: Final answer
    x = 210.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.