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Finding the Fourth Proportional to 496.67, 747.81 and 439.25

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Solution

The fourth proportional to 496.67, 747.81 and 439.25 is: 661.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    496.67 : 747.81 = 439.25 : x
  2. Step 2: Convert to fraction form
    496.67/747.81 = 439.25/x
  3. Step 3: Cross multiply
    496.67x = 747.81 × 439.25
  4. Step 4: Simplify right side
    496.67x = 328,471.80
  5. Step 5: Solve for x
    x = 328,471.80/496.67
  6. Step 6: Final answer
    x = 661.35

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.