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Finding the Fourth Proportional to 617.20, 923.74 and 519.82

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Solution

The fourth proportional to 617.20, 923.74 and 519.82 is: 778.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.20 : 923.74 = 519.82 : x
  2. Step 2: Convert to fraction form
    617.20/923.74 = 519.82/x
  3. Step 3: Cross multiply
    617.20x = 923.74 × 519.82
  4. Step 4: Simplify right side
    617.20x = 480,178.53
  5. Step 5: Solve for x
    x = 480,178.53/617.20
  6. Step 6: Final answer
    x = 778.00

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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.