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Finding the Fourth Proportional to 239.58, 329.81 and 215.01

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Solution

The fourth proportional to 239.58, 329.81 and 215.01 is: 295.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    239.58 : 329.81 = 215.01 : x
  2. Step 2: Convert to fraction form
    239.58/329.81 = 215.01/x
  3. Step 3: Cross multiply
    239.58x = 329.81 × 215.01
  4. Step 4: Simplify right side
    239.58x = 70,911.37
  5. Step 5: Solve for x
    x = 70,911.37/239.58
  6. Step 6: Final answer
    x = 295.98

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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.