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Finding the Fourth Proportional to 399.93, 551.88 and 242.65

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Solution

The fourth proportional to 399.93, 551.88 and 242.65 is: 334.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    399.93 : 551.88 = 242.65 : x
  2. Step 2: Convert to fraction form
    399.93/551.88 = 242.65/x
  3. Step 3: Cross multiply
    399.93x = 551.88 × 242.65
  4. Step 4: Simplify right side
    399.93x = 133,913.68
  5. Step 5: Solve for x
    x = 133,913.68/399.93
  6. Step 6: Final answer
    x = 334.84

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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.