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Finding the Fourth Proportional to 518.18, 714.98 and 328.95

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Solution

The fourth proportional to 518.18, 714.98 and 328.95 is: 453.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.18 : 714.98 = 328.95 : x
  2. Step 2: Convert to fraction form
    518.18/714.98 = 328.95/x
  3. Step 3: Cross multiply
    518.18x = 714.98 × 328.95
  4. Step 4: Simplify right side
    518.18x = 235,191.03
  5. Step 5: Solve for x
    x = 235,191.03/518.18
  6. Step 6: Final answer
    x = 453.88

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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.