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Finding the Fourth Proportional to 453.51, 680.30 and 261.03

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Solution

The fourth proportional to 453.51, 680.30 and 261.03 is: 391.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.51 : 680.30 = 261.03 : x
  2. Step 2: Convert to fraction form
    453.51/680.30 = 261.03/x
  3. Step 3: Cross multiply
    453.51x = 680.30 × 261.03
  4. Step 4: Simplify right side
    453.51x = 177,577.40
  5. Step 5: Solve for x
    x = 177,577.40/453.51
  6. Step 6: Final answer
    x = 391.56

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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.