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Finding the Fourth Proportional to 551.66, 760.92 and 330.47

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Solution

The fourth proportional to 551.66, 760.92 and 330.47 is: 455.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    551.66 : 760.92 = 330.47 : x
  2. Step 2: Convert to fraction form
    551.66/760.92 = 330.47/x
  3. Step 3: Cross multiply
    551.66x = 760.92 × 330.47
  4. Step 4: Simplify right side
    551.66x = 251,461.23
  5. Step 5: Solve for x
    x = 251,461.23/551.66
  6. Step 6: Final answer
    x = 455.83

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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.