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Finding the Fourth Proportional to 439.01, 605.64 and 308.19

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Solution

The fourth proportional to 439.01, 605.64 and 308.19 is: 425.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.01 : 605.64 = 308.19 : x
  2. Step 2: Convert to fraction form
    439.01/605.64 = 308.19/x
  3. Step 3: Cross multiply
    439.01x = 605.64 × 308.19
  4. Step 4: Simplify right side
    439.01x = 186,652.19
  5. Step 5: Solve for x
    x = 186,652.19/439.01
  6. Step 6: Final answer
    x = 425.17

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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.