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Finding the Fourth Proportional to 242.91, 335.61 and 216.45

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Solution

The fourth proportional to 242.91, 335.61 and 216.45 is: 299.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    242.91 : 335.61 = 216.45 : x
  2. Step 2: Convert to fraction form
    242.91/335.61 = 216.45/x
  3. Step 3: Cross multiply
    242.91x = 335.61 × 216.45
  4. Step 4: Simplify right side
    242.91x = 72,642.78
  5. Step 5: Solve for x
    x = 72,642.78/242.91
  6. Step 6: Final answer
    x = 299.05

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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.