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Finding the Fourth Proportional to 405.01, 558.60 and 239.22

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Solution

The fourth proportional to 405.01, 558.60 and 239.22 is: 329.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    405.01 : 558.60 = 239.22 : x
  2. Step 2: Convert to fraction form
    405.01/558.60 = 239.22/x
  3. Step 3: Cross multiply
    405.01x = 558.60 × 239.22
  4. Step 4: Simplify right side
    405.01x = 133,627.39
  5. Step 5: Solve for x
    x = 133,627.39/405.01
  6. Step 6: Final answer
    x = 329.94

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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.