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Finding the Fourth Proportional to 242.93, 336.65 and 238.31

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Solution

The fourth proportional to 242.93, 336.65 and 238.31 is: 330.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.93 : 336.65 = 238.31 : x
  2. Step 2: Convert to fraction form
    242.93/336.65 = 238.31/x
  3. Step 3: Cross multiply
    242.93x = 336.65 × 238.31
  4. Step 4: Simplify right side
    242.93x = 80,228.31
  5. Step 5: Solve for x
    x = 80,228.31/242.93
  6. Step 6: Final answer
    x = 330.25

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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.