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Finding the Fourth Proportional to 405.44, 609.98 and 243.24

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Solution

The fourth proportional to 405.44, 609.98 and 243.24 is: 365.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    405.44 : 609.98 = 243.24 : x
  2. Step 2: Convert to fraction form
    405.44/609.98 = 243.24/x
  3. Step 3: Cross multiply
    405.44x = 609.98 × 243.24
  4. Step 4: Simplify right side
    405.44x = 148,371.54
  5. Step 5: Solve for x
    x = 148,371.54/405.44
  6. Step 6: Final answer
    x = 365.95

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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.