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Finding the Fourth Proportional to 453.82, 680.72 and 145.66

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Solution

The fourth proportional to 453.82, 680.72 and 145.66 is: 218.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.82 : 680.72 = 145.66 : x
  2. Step 2: Convert to fraction form
    453.82/680.72 = 145.66/x
  3. Step 3: Cross multiply
    453.82x = 680.72 × 145.66
  4. Step 4: Simplify right side
    453.82x = 99,153.68
  5. Step 5: Solve for x
    x = 99,153.68/453.82
  6. Step 6: Final answer
    x = 218.49

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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.