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Finding the Fourth Proportional to 375.12, 517.56 and 328.68

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Solution

The fourth proportional to 375.12, 517.56 and 328.68 is: 453.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    375.12 : 517.56 = 328.68 : x
  2. Step 2: Convert to fraction form
    375.12/517.56 = 328.68/x
  3. Step 3: Cross multiply
    375.12x = 517.56 × 328.68
  4. Step 4: Simplify right side
    375.12x = 170,111.62
  5. Step 5: Solve for x
    x = 170,111.62/375.12
  6. Step 6: Final answer
    x = 453.49

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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.