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Finding the Fourth Proportional to 452.85, 679.37 and 209.45

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Solution

The fourth proportional to 452.85, 679.37 and 209.45 is: 314.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    452.85 : 679.37 = 209.45 : x
  2. Step 2: Convert to fraction form
    452.85/679.37 = 209.45/x
  3. Step 3: Cross multiply
    452.85x = 679.37 × 209.45
  4. Step 4: Simplify right side
    452.85x = 142,289.60
  5. Step 5: Solve for x
    x = 142,289.60/452.85
  6. Step 6: Final answer
    x = 314.21

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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.