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Finding the Fourth Proportional to 487.75, 731.73 and 141.09

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Solution

The fourth proportional to 487.75, 731.73 and 141.09 is: 211.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    487.75 : 731.73 = 141.09 : x
  2. Step 2: Convert to fraction form
    487.75/731.73 = 141.09/x
  3. Step 3: Cross multiply
    487.75x = 731.73 × 141.09
  4. Step 4: Simplify right side
    487.75x = 103,242.42
  5. Step 5: Solve for x
    x = 103,242.42/487.75
  6. Step 6: Final answer
    x = 211.67

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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.