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Finding the Fourth Proportional to 242.74, 336.37 and 239.77

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Solution

The fourth proportional to 242.74, 336.37 and 239.77 is: 332.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.74 : 336.37 = 239.77 : x
  2. Step 2: Convert to fraction form
    242.74/336.37 = 239.77/x
  3. Step 3: Cross multiply
    242.74x = 336.37 × 239.77
  4. Step 4: Simplify right side
    242.74x = 80,651.43
  5. Step 5: Solve for x
    x = 80,651.43/242.74
  6. Step 6: Final answer
    x = 332.25

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.