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Finding the Fourth Proportional to 453.17, 679.26 and 257.91

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Solution

The fourth proportional to 453.17, 679.26 and 257.91 is: 386.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.17 : 679.26 = 257.91 : x
  2. Step 2: Convert to fraction form
    453.17/679.26 = 257.91/x
  3. Step 3: Cross multiply
    453.17x = 679.26 × 257.91
  4. Step 4: Simplify right side
    453.17x = 175,187.95
  5. Step 5: Solve for x
    x = 175,187.95/453.17
  6. Step 6: Final answer
    x = 386.59

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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.