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Finding the Fourth Proportional to 405.44, 559.37 and 247.99

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Solution

The fourth proportional to 405.44, 559.37 and 247.99 is: 342.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    405.44 : 559.37 = 247.99 : x
  2. Step 2: Convert to fraction form
    405.44/559.37 = 247.99/x
  3. Step 3: Cross multiply
    405.44x = 559.37 × 247.99
  4. Step 4: Simplify right side
    405.44x = 138,717.39
  5. Step 5: Solve for x
    x = 138,717.39/405.44
  6. Step 6: Final answer
    x = 342.14

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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.