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Finding the Fourth Proportional to 395.19, 546.12 and 328.74

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Solution

The fourth proportional to 395.19, 546.12 and 328.74 is: 454.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    395.19 : 546.12 = 328.74 : x
  2. Step 2: Convert to fraction form
    395.19/546.12 = 328.74/x
  3. Step 3: Cross multiply
    395.19x = 546.12 × 328.74
  4. Step 4: Simplify right side
    395.19x = 179,531.49
  5. Step 5: Solve for x
    x = 179,531.49/395.19
  6. Step 6: Final answer
    x = 454.29

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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.