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Finding the Fourth Proportional to 617.40, 852.20 and 355.59

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Solution

The fourth proportional to 617.40, 852.20 and 355.59 is: 490.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.40 : 852.20 = 355.59 : x
  2. Step 2: Convert to fraction form
    617.40/852.20 = 355.59/x
  3. Step 3: Cross multiply
    617.40x = 852.20 × 355.59
  4. Step 4: Simplify right side
    617.40x = 303,033.80
  5. Step 5: Solve for x
    x = 303,033.80/617.40
  6. Step 6: Final answer
    x = 490.82

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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.