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Finding the Fourth Proportional to 403.99, 605.95 and 239.36

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Solution

The fourth proportional to 403.99, 605.95 and 239.36 is: 359.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    403.99 : 605.95 = 239.36 : x
  2. Step 2: Convert to fraction form
    403.99/605.95 = 239.36/x
  3. Step 3: Cross multiply
    403.99x = 605.95 × 239.36
  4. Step 4: Simplify right side
    403.99x = 145,036.56
  5. Step 5: Solve for x
    x = 145,036.56/403.99
  6. Step 6: Final answer
    x = 359.01

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.