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Finding the Fourth Proportional to 617.99, 927.91 and 388.34

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Solution

The fourth proportional to 617.99, 927.91 and 388.34 is: 583.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.99 : 927.91 = 388.34 : x
  2. Step 2: Convert to fraction form
    617.99/927.91 = 388.34/x
  3. Step 3: Cross multiply
    617.99x = 927.91 × 388.34
  4. Step 4: Simplify right side
    617.99x = 360,339.93
  5. Step 5: Solve for x
    x = 360,339.93/617.99
  6. Step 6: Final answer
    x = 583.08

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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.