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Finding the Fourth Proportional to 439.47, 605.93 and 308.25

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Solution

The fourth proportional to 439.47, 605.93 and 308.25 is: 425.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.47 : 605.93 = 308.25 : x
  2. Step 2: Convert to fraction form
    439.47/605.93 = 308.25/x
  3. Step 3: Cross multiply
    439.47x = 605.93 × 308.25
  4. Step 4: Simplify right side
    439.47x = 186,776.38
  5. Step 5: Solve for x
    x = 186,776.38/439.47
  6. Step 6: Final answer
    x = 425.00

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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.