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Finding the Fourth Proportional to 374.37, 517.82 and 330.71

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Solution

The fourth proportional to 374.37, 517.82 and 330.71 is: 457.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.37 : 517.82 = 330.71 : x
  2. Step 2: Convert to fraction form
    374.37/517.82 = 330.71/x
  3. Step 3: Cross multiply
    374.37x = 517.82 × 330.71
  4. Step 4: Simplify right side
    374.37x = 171,246.40
  5. Step 5: Solve for x
    x = 171,246.40/374.37
  6. Step 6: Final answer
    x = 457.42

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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.