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Finding the Fourth Proportional to 494.71, 681.82 and 439.36

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Solution

The fourth proportional to 494.71, 681.82 and 439.36 is: 605.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    494.71 : 681.82 = 439.36 : x
  2. Step 2: Convert to fraction form
    494.71/681.82 = 439.36/x
  3. Step 3: Cross multiply
    494.71x = 681.82 × 439.36
  4. Step 4: Simplify right side
    494.71x = 299,561.63
  5. Step 5: Solve for x
    x = 299,561.63/494.71
  6. Step 6: Final answer
    x = 605.53

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.