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Finding the Fourth Proportional to 453.90, 680.34 and 316.53

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Solution

The fourth proportional to 453.90, 680.34 and 316.53 is: 474.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.90 : 680.34 = 316.53 : x
  2. Step 2: Convert to fraction form
    453.90/680.34 = 316.53/x
  3. Step 3: Cross multiply
    453.90x = 680.34 × 316.53
  4. Step 4: Simplify right side
    453.90x = 215,348.02
  5. Step 5: Solve for x
    x = 215,348.02/453.90
  6. Step 6: Final answer
    x = 474.44

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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.