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Finding the Fourth Proportional to 242.88, 332.20 and 239.10

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Solution

The fourth proportional to 242.88, 332.20 and 239.10 is: 327.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.88 : 332.20 = 239.10 : x
  2. Step 2: Convert to fraction form
    242.88/332.20 = 239.10/x
  3. Step 3: Cross multiply
    242.88x = 332.20 × 239.10
  4. Step 4: Simplify right side
    242.88x = 79,429.02
  5. Step 5: Solve for x
    x = 79,429.02/242.88
  6. Step 6: Final answer
    x = 327.03

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.