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Finding the Fourth Proportional to 518.85, 714.96 and 493.74

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Solution

The fourth proportional to 518.85, 714.96 and 493.74 is: 680.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.85 : 714.96 = 493.74 : x
  2. Step 2: Convert to fraction form
    518.85/714.96 = 493.74/x
  3. Step 3: Cross multiply
    518.85x = 714.96 × 493.74
  4. Step 4: Simplify right side
    518.85x = 353,004.35
  5. Step 5: Solve for x
    x = 353,004.35/518.85
  6. Step 6: Final answer
    x = 680.36

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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.