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Finding the Fourth Proportional to 201.16, 302.20 and 143.51

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Solution

The fourth proportional to 201.16, 302.20 and 143.51 is: 215.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    201.16 : 302.20 = 143.51 : x
  2. Step 2: Convert to fraction form
    201.16/302.20 = 143.51/x
  3. Step 3: Cross multiply
    201.16x = 302.20 × 143.51
  4. Step 4: Simplify right side
    201.16x = 43,368.72
  5. Step 5: Solve for x
    x = 43,368.72/201.16
  6. Step 6: Final answer
    x = 215.59

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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.