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Finding the Fourth Proportional to 551.20, 760.22 and 330.10

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Solution

The fourth proportional to 551.20, 760.22 and 330.10 is: 455.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.20 : 760.22 = 330.10 : x
  2. Step 2: Convert to fraction form
    551.20/760.22 = 330.10/x
  3. Step 3: Cross multiply
    551.20x = 760.22 × 330.10
  4. Step 4: Simplify right side
    551.20x = 250,948.62
  5. Step 5: Solve for x
    x = 250,948.62/551.20
  6. Step 6: Final answer
    x = 455.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.