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Finding the Fourth Proportional to 628.28, 937.05 and 551.74

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Solution

The fourth proportional to 628.28, 937.05 and 551.74 is: 822.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    628.28 : 937.05 = 551.74 : x
  2. Step 2: Convert to fraction form
    628.28/937.05 = 551.74/x
  3. Step 3: Cross multiply
    628.28x = 937.05 × 551.74
  4. Step 4: Simplify right side
    628.28x = 517,007.97
  5. Step 5: Solve for x
    x = 517,007.97/628.28
  6. Step 6: Final answer
    x = 822.89

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.