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Finding the Fourth Proportional to 500.81, 691.62 and 439.25

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Solution

The fourth proportional to 500.81, 691.62 and 439.25 is: 606.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    500.81 : 691.62 = 439.25 : x
  2. Step 2: Convert to fraction form
    500.81/691.62 = 439.25/x
  3. Step 3: Cross multiply
    500.81x = 691.62 × 439.25
  4. Step 4: Simplify right side
    500.81x = 303,794.09
  5. Step 5: Solve for x
    x = 303,794.09/500.81
  6. Step 6: Final answer
    x = 606.61

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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.