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Finding the Fourth Proportional to 405.55, 559.79 and 323.02

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Solution

The fourth proportional to 405.55, 559.79 and 323.02 is: 445.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    405.55 : 559.79 = 323.02 : x
  2. Step 2: Convert to fraction form
    405.55/559.79 = 323.02/x
  3. Step 3: Cross multiply
    405.55x = 559.79 × 323.02
  4. Step 4: Simplify right side
    405.55x = 180,823.37
  5. Step 5: Solve for x
    x = 180,823.37/405.55
  6. Step 6: Final answer
    x = 445.87

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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.