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Finding the Fourth Proportional to 351.34, 484.79 and 209.53

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Solution

The fourth proportional to 351.34, 484.79 and 209.53 is: 289.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    351.34 : 484.79 = 209.53 : x
  2. Step 2: Convert to fraction form
    351.34/484.79 = 209.53/x
  3. Step 3: Cross multiply
    351.34x = 484.79 × 209.53
  4. Step 4: Simplify right side
    351.34x = 101,576.57
  5. Step 5: Solve for x
    x = 101,576.57/351.34
  6. Step 6: Final answer
    x = 289.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.