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Finding the Fourth Proportional to 453.41, 679.60 and 209.43

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Solution

The fourth proportional to 453.41, 679.60 and 209.43 is: 313.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.41 : 679.60 = 209.43 : x
  2. Step 2: Convert to fraction form
    453.41/679.60 = 209.43/x
  3. Step 3: Cross multiply
    453.41x = 679.60 × 209.43
  4. Step 4: Simplify right side
    453.41x = 142,328.63
  5. Step 5: Solve for x
    x = 142,328.63/453.41
  6. Step 6: Final answer
    x = 313.91

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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.