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Finding the Fourth Proportional to 619.12, 928.82 and 551.14

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Solution

The fourth proportional to 619.12, 928.82 and 551.14 is: 826.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.12 : 928.82 = 551.14 : x
  2. Step 2: Convert to fraction form
    619.12/928.82 = 551.14/x
  3. Step 3: Cross multiply
    619.12x = 928.82 × 551.14
  4. Step 4: Simplify right side
    619.12x = 511,909.85
  5. Step 5: Solve for x
    x = 511,909.85/619.12
  6. Step 6: Final answer
    x = 826.83

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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.