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Finding the Fourth Proportional to 201.32, 302.15 and 143.68

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Solution

The fourth proportional to 201.32, 302.15 and 143.68 is: 215.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.32 : 302.15 = 143.68 : x
  2. Step 2: Convert to fraction form
    201.32/302.15 = 143.68/x
  3. Step 3: Cross multiply
    201.32x = 302.15 × 143.68
  4. Step 4: Simplify right side
    201.32x = 43,412.19
  5. Step 5: Solve for x
    x = 43,412.19/201.32
  6. Step 6: Final answer
    x = 215.64

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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.