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Finding the Fourth Proportional to 551.58, 827.39 and 405.51

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Solution

The fourth proportional to 551.58, 827.39 and 405.51 is: 608.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.58 : 827.39 = 405.51 : x
  2. Step 2: Convert to fraction form
    551.58/827.39 = 405.51/x
  3. Step 3: Cross multiply
    551.58x = 827.39 × 405.51
  4. Step 4: Simplify right side
    551.58x = 335,514.92
  5. Step 5: Solve for x
    x = 335,514.92/551.58
  6. Step 6: Final answer
    x = 608.28

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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.