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Finding the Fourth Proportional to 201.71, 302.63 and 120.45

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Solution

The fourth proportional to 201.71, 302.63 and 120.45 is: 180.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.71 : 302.63 = 120.45 : x
  2. Step 2: Convert to fraction form
    201.71/302.63 = 120.45/x
  3. Step 3: Cross multiply
    201.71x = 302.63 × 120.45
  4. Step 4: Simplify right side
    201.71x = 36,451.18
  5. Step 5: Solve for x
    x = 36,451.18/201.71
  6. Step 6: Final answer
    x = 180.72

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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.