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Finding the Fourth Proportional to 439.49, 606.49 and 243.00

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Solution

The fourth proportional to 439.49, 606.49 and 243.00 is: 335.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.49 : 606.49 = 243.00 : x
  2. Step 2: Convert to fraction form
    439.49/606.49 = 243.00/x
  3. Step 3: Cross multiply
    439.49x = 606.49 × 243.00
  4. Step 4: Simplify right side
    439.49x = 147,379.19
  5. Step 5: Solve for x
    x = 147,379.19/439.49
  6. Step 6: Final answer
    x = 335.35

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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.