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Finding the Fourth Proportional to 453.08, 679.35 and 209.30

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Solution

The fourth proportional to 453.08, 679.35 and 209.30 is: 313.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.08 : 679.35 = 209.30 : x
  2. Step 2: Convert to fraction form
    453.08/679.35 = 209.30/x
  3. Step 3: Cross multiply
    453.08x = 679.35 × 209.30
  4. Step 4: Simplify right side
    453.08x = 142,184.56
  5. Step 5: Solve for x
    x = 142,184.56/453.08
  6. Step 6: Final answer
    x = 313.82

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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.