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Finding the Fourth Proportional to 519.88, 778.62 and 357.16

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Solution

The fourth proportional to 519.88, 778.62 and 357.16 is: 534.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.88 : 778.62 = 357.16 : x
  2. Step 2: Convert to fraction form
    519.88/778.62 = 357.16/x
  3. Step 3: Cross multiply
    519.88x = 778.62 × 357.16
  4. Step 4: Simplify right side
    519.88x = 278,091.92
  5. Step 5: Solve for x
    x = 278,091.92/519.88
  6. Step 6: Final answer
    x = 534.92

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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.