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Finding the Fourth Proportional to 579.49, 864.22 and 551.95

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Solution

The fourth proportional to 579.49, 864.22 and 551.95 is: 823.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    579.49 : 864.22 = 551.95 : x
  2. Step 2: Convert to fraction form
    579.49/864.22 = 551.95/x
  3. Step 3: Cross multiply
    579.49x = 864.22 × 551.95
  4. Step 4: Simplify right side
    579.49x = 477,006.23
  5. Step 5: Solve for x
    x = 477,006.23/579.49
  6. Step 6: Final answer
    x = 823.15

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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.