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Finding the Fourth Proportional to 242.15, 334.17 and 131.63

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Solution

The fourth proportional to 242.15, 334.17 and 131.63 is: 181.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.15 : 334.17 = 131.63 : x
  2. Step 2: Convert to fraction form
    242.15/334.17 = 131.63/x
  3. Step 3: Cross multiply
    242.15x = 334.17 × 131.63
  4. Step 4: Simplify right side
    242.15x = 43,984.47
  5. Step 5: Solve for x
    x = 43,984.47/242.15
  6. Step 6: Final answer
    x = 181.64

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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.