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Finding the Fourth Proportional to 453.42, 679.04 and 308.70

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Solution

The fourth proportional to 453.42, 679.04 and 308.70 is: 462.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.42 : 679.04 = 308.70 : x
  2. Step 2: Convert to fraction form
    453.42/679.04 = 308.70/x
  3. Step 3: Cross multiply
    453.42x = 679.04 × 308.70
  4. Step 4: Simplify right side
    453.42x = 209,619.65
  5. Step 5: Solve for x
    x = 209,619.65/453.42
  6. Step 6: Final answer
    x = 462.31

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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.