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Finding the Fourth Proportional to 617.82, 852.70 and 355.83

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Solution

The fourth proportional to 617.82, 852.70 and 355.83 is: 491.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.82 : 852.70 = 355.83 : x
  2. Step 2: Convert to fraction form
    617.82/852.70 = 355.83/x
  3. Step 3: Cross multiply
    617.82x = 852.70 × 355.83
  4. Step 4: Simplify right side
    617.82x = 303,416.24
  5. Step 5: Solve for x
    x = 303,416.24/617.82
  6. Step 6: Final answer
    x = 491.11

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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.