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Finding the Fourth Proportional to 617.91, 852.71 and 355.92

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Solution

The fourth proportional to 617.91, 852.71 and 355.92 is: 491.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.91 : 852.71 = 355.92 : x
  2. Step 2: Convert to fraction form
    617.91/852.71 = 355.92/x
  3. Step 3: Cross multiply
    617.91x = 852.71 × 355.92
  4. Step 4: Simplify right side
    617.91x = 303,498.36
  5. Step 5: Solve for x
    x = 303,498.36/617.91
  6. Step 6: Final answer
    x = 491.17

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.