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Finding the Fourth Proportional to 453.28, 679.74 and 206.50

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Solution

The fourth proportional to 453.28, 679.74 and 206.50 is: 309.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.28 : 679.74 = 206.50 : x
  2. Step 2: Convert to fraction form
    453.28/679.74 = 206.50/x
  3. Step 3: Cross multiply
    453.28x = 679.74 × 206.50
  4. Step 4: Simplify right side
    453.28x = 140,366.31
  5. Step 5: Solve for x
    x = 140,366.31/453.28
  6. Step 6: Final answer
    x = 309.67

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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.