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Finding the Fourth Proportional to 617.45, 852.09 and 351.95

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Solution

The fourth proportional to 617.45, 852.09 and 351.95 is: 485.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.45 : 852.09 = 351.95 : x
  2. Step 2: Convert to fraction form
    617.45/852.09 = 351.95/x
  3. Step 3: Cross multiply
    617.45x = 852.09 × 351.95
  4. Step 4: Simplify right side
    617.45x = 299,893.08
  5. Step 5: Solve for x
    x = 299,893.08/617.45
  6. Step 6: Final answer
    x = 485.70

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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.