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Finding the Fourth Proportional to 141.51, 211.50 and 140.31

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Solution

The fourth proportional to 141.51, 211.50 and 140.31 is: 209.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    141.51 : 211.50 = 140.31 : x
  2. Step 2: Convert to fraction form
    141.51/211.50 = 140.31/x
  3. Step 3: Cross multiply
    141.51x = 211.50 × 140.31
  4. Step 4: Simplify right side
    141.51x = 29,675.57
  5. Step 5: Solve for x
    x = 29,675.57/141.51
  6. Step 6: Final answer
    x = 209.71

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.