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Finding the Fourth Proportional to 518.50, 714.54 and 479.26

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Solution

The fourth proportional to 518.50, 714.54 and 479.26 is: 660.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    518.50 : 714.54 = 479.26 : x
  2. Step 2: Convert to fraction form
    518.50/714.54 = 479.26/x
  3. Step 3: Cross multiply
    518.50x = 714.54 × 479.26
  4. Step 4: Simplify right side
    518.50x = 342,450.44
  5. Step 5: Solve for x
    x = 342,450.44/518.50
  6. Step 6: Final answer
    x = 660.46

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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.