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Finding the Fourth Proportional to 456.28, 684.28 and 302.20

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Solution

The fourth proportional to 456.28, 684.28 and 302.20 is: 453.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    456.28 : 684.28 = 302.20 : x
  2. Step 2: Convert to fraction form
    456.28/684.28 = 302.20/x
  3. Step 3: Cross multiply
    456.28x = 684.28 × 302.20
  4. Step 4: Simplify right side
    456.28x = 206,789.42
  5. Step 5: Solve for x
    x = 206,789.42/456.28
  6. Step 6: Final answer
    x = 453.21

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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.