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Finding the Fourth Proportional to 453.71, 680.61 and 145.45

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Solution

The fourth proportional to 453.71, 680.61 and 145.45 is: 218.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.71 : 680.61 = 145.45 : x
  2. Step 2: Convert to fraction form
    453.71/680.61 = 145.45/x
  3. Step 3: Cross multiply
    453.71x = 680.61 × 145.45
  4. Step 4: Simplify right side
    453.71x = 98,994.72
  5. Step 5: Solve for x
    x = 98,994.72/453.71
  6. Step 6: Final answer
    x = 218.19

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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.