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Finding the Fourth Proportional to 554.45, 825.39 and 551.68

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Solution

The fourth proportional to 554.45, 825.39 and 551.68 is: 821.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.45 : 825.39 = 551.68 : x
  2. Step 2: Convert to fraction form
    554.45/825.39 = 551.68/x
  3. Step 3: Cross multiply
    554.45x = 825.39 × 551.68
  4. Step 4: Simplify right side
    554.45x = 455,349.09
  5. Step 5: Solve for x
    x = 455,349.09/554.45
  6. Step 6: Final answer
    x = 821.27

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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.