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Finding the Fourth Proportional to 453.54, 679.91 and 439.77

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Solution

The fourth proportional to 453.54, 679.91 and 439.77 is: 659.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    453.54 : 679.91 = 439.77 : x
  2. Step 2: Convert to fraction form
    453.54/679.91 = 439.77/x
  3. Step 3: Cross multiply
    453.54x = 679.91 × 439.77
  4. Step 4: Simplify right side
    453.54x = 299,001.82
  5. Step 5: Solve for x
    x = 299,001.82/453.54
  6. Step 6: Final answer
    x = 659.26

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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.