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Finding the Fourth Proportional to 439.93, 605.86 and 400.99

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Solution

The fourth proportional to 439.93, 605.86 and 400.99 is: 552.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    439.93 : 605.86 = 400.99 : x
  2. Step 2: Convert to fraction form
    439.93/605.86 = 400.99/x
  3. Step 3: Cross multiply
    439.93x = 605.86 × 400.99
  4. Step 4: Simplify right side
    439.93x = 242,943.80
  5. Step 5: Solve for x
    x = 242,943.80/439.93
  6. Step 6: Final answer
    x = 552.23

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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.