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Finding the Fourth Proportional to 551.19, 827.33 and 390.27

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Solution

The fourth proportional to 551.19, 827.33 and 390.27 is: 585.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.19 : 827.33 = 390.27 : x
  2. Step 2: Convert to fraction form
    551.19/827.33 = 390.27/x
  3. Step 3: Cross multiply
    551.19x = 827.33 × 390.27
  4. Step 4: Simplify right side
    551.19x = 322,880.13
  5. Step 5: Solve for x
    x = 322,880.13/551.19
  6. Step 6: Final answer
    x = 585.79

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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.