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Finding the Fourth Proportional to 242.15, 333.99 and 154.76

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Solution

The fourth proportional to 242.15, 333.99 and 154.76 is: 213.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.15 : 333.99 = 154.76 : x
  2. Step 2: Convert to fraction form
    242.15/333.99 = 154.76/x
  3. Step 3: Cross multiply
    242.15x = 333.99 × 154.76
  4. Step 4: Simplify right side
    242.15x = 51,686.62
  5. Step 5: Solve for x
    x = 51,686.62/242.15
  6. Step 6: Final answer
    x = 213.45

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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.