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Finding the Fourth Proportional to 453.71, 680.37 and 129.00

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Solution

The fourth proportional to 453.71, 680.37 and 129.00 is: 193.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.71 : 680.37 = 129.00 : x
  2. Step 2: Convert to fraction form
    453.71/680.37 = 129.00/x
  3. Step 3: Cross multiply
    453.71x = 680.37 × 129.00
  4. Step 4: Simplify right side
    453.71x = 87,769.80
  5. Step 5: Solve for x
    x = 87,769.80/453.71
  6. Step 6: Final answer
    x = 193.45

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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.