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Finding the Fourth Proportional to 453.86, 681 and 145.76

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Solution

The fourth proportional to 453.86, 681 and 145.76 is: 218.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.86 : 681 = 145.76 : x
  2. Step 2: Convert to fraction form
    453.86/681 = 145.76/x
  3. Step 3: Cross multiply
    453.86x = 681 × 145.76
  4. Step 4: Simplify right side
    453.86x = 99,262.56
  5. Step 5: Solve for x
    x = 99,262.56/453.86
  6. Step 6: Final answer
    x = 218.71

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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.