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Finding the Fourth Proportional to 242.99, 335.75 and 220.05

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Solution

The fourth proportional to 242.99, 335.75 and 220.05 is: 304.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.99 : 335.75 = 220.05 : x
  2. Step 2: Convert to fraction form
    242.99/335.75 = 220.05/x
  3. Step 3: Cross multiply
    242.99x = 335.75 × 220.05
  4. Step 4: Simplify right side
    242.99x = 73,880.69
  5. Step 5: Solve for x
    x = 73,880.69/242.99
  6. Step 6: Final answer
    x = 304.05

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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.