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Finding the Fourth Proportional to 551.71, 828.15 and 308.71

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Solution

The fourth proportional to 551.71, 828.15 and 308.71 is: 463.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.71 : 828.15 = 308.71 : x
  2. Step 2: Convert to fraction form
    551.71/828.15 = 308.71/x
  3. Step 3: Cross multiply
    551.71x = 828.15 × 308.71
  4. Step 4: Simplify right side
    551.71x = 255,658.19
  5. Step 5: Solve for x
    x = 255,658.19/551.71
  6. Step 6: Final answer
    x = 463.39

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.