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Finding the Fourth Proportional to 518.03, 714.78 and 308.24

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Solution

The fourth proportional to 518.03, 714.78 and 308.24 is: 425.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.03 : 714.78 = 308.24 : x
  2. Step 2: Convert to fraction form
    518.03/714.78 = 308.24/x
  3. Step 3: Cross multiply
    518.03x = 714.78 × 308.24
  4. Step 4: Simplify right side
    518.03x = 220,320.21
  5. Step 5: Solve for x
    x = 220,320.21/518.03
  6. Step 6: Final answer
    x = 425.31

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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.