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Finding the Fourth Proportional to 619.17, 928.93 and 551.17

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Solution

The fourth proportional to 619.17, 928.93 and 551.17 is: 826.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    619.17 : 928.93 = 551.17 : x
  2. Step 2: Convert to fraction form
    619.17/928.93 = 551.17/x
  3. Step 3: Cross multiply
    619.17x = 928.93 × 551.17
  4. Step 4: Simplify right side
    619.17x = 512,003.33
  5. Step 5: Solve for x
    x = 512,003.33/619.17
  6. Step 6: Final answer
    x = 826.91

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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.