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Finding the Fourth Proportional to 308.19, 425.42 and 242.99

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Solution

The fourth proportional to 308.19, 425.42 and 242.99 is: 335.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.19 : 425.42 = 242.99 : x
  2. Step 2: Convert to fraction form
    308.19/425.42 = 242.99/x
  3. Step 3: Cross multiply
    308.19x = 425.42 × 242.99
  4. Step 4: Simplify right side
    308.19x = 103,372.81
  5. Step 5: Solve for x
    x = 103,372.81/308.19
  6. Step 6: Final answer
    x = 335.42

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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.