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Finding the Fourth Proportional to 551.76, 768.30 and 551.76

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Solution

The fourth proportional to 551.76, 768.30 and 551.76 is: 768.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.76 : 768.30 = 551.76 : x
  2. Step 2: Convert to fraction form
    551.76/768.30 = 551.76/x
  3. Step 3: Cross multiply
    551.76x = 768.30 × 551.76
  4. Step 4: Simplify right side
    551.76x = 423,917.21
  5. Step 5: Solve for x
    x = 423,917.21/551.76
  6. Step 6: Final answer
    x = 768.30

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.