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Finding the Fourth Proportional to 439.53, 661.67 and 401.26

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Solution

The fourth proportional to 439.53, 661.67 and 401.26 is: 604.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.53 : 661.67 = 401.26 : x
  2. Step 2: Convert to fraction form
    439.53/661.67 = 401.26/x
  3. Step 3: Cross multiply
    439.53x = 661.67 × 401.26
  4. Step 4: Simplify right side
    439.53x = 265,501.70
  5. Step 5: Solve for x
    x = 265,501.70/439.53
  6. Step 6: Final answer
    x = 604.06

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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.