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Finding the Fourth Proportional to 519.05, 778.55 and 210.84

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Solution

The fourth proportional to 519.05, 778.55 and 210.84 is: 316.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.05 : 778.55 = 210.84 : x
  2. Step 2: Convert to fraction form
    519.05/778.55 = 210.84/x
  3. Step 3: Cross multiply
    519.05x = 778.55 × 210.84
  4. Step 4: Simplify right side
    519.05x = 164,148.43
  5. Step 5: Solve for x
    x = 164,148.43/519.05
  6. Step 6: Final answer
    x = 316.25

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.