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Finding the Fourth Proportional to 551.22, 760.71 and 330.18

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Solution

The fourth proportional to 551.22, 760.71 and 330.18 is: 455.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.22 : 760.71 = 330.18 : x
  2. Step 2: Convert to fraction form
    551.22/760.71 = 330.18/x
  3. Step 3: Cross multiply
    551.22x = 760.71 × 330.18
  4. Step 4: Simplify right side
    551.22x = 251,171.23
  5. Step 5: Solve for x
    x = 251,171.23/551.22
  6. Step 6: Final answer
    x = 455.66

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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.