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Finding the Fourth Proportional to 374.06, 513.42 and 331.68

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Solution

The fourth proportional to 374.06, 513.42 and 331.68 is: 455.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    374.06 : 513.42 = 331.68 : x
  2. Step 2: Convert to fraction form
    374.06/513.42 = 331.68/x
  3. Step 3: Cross multiply
    374.06x = 513.42 × 331.68
  4. Step 4: Simplify right side
    374.06x = 170,291.15
  5. Step 5: Solve for x
    x = 170,291.15/374.06
  6. Step 6: Final answer
    x = 455.25

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.