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Finding the Fourth Proportional to 617.22, 851.44 and 355.06

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Solution

The fourth proportional to 617.22, 851.44 and 355.06 is: 489.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.22 : 851.44 = 355.06 : x
  2. Step 2: Convert to fraction form
    617.22/851.44 = 355.06/x
  3. Step 3: Cross multiply
    617.22x = 851.44 × 355.06
  4. Step 4: Simplify right side
    617.22x = 302,312.29
  5. Step 5: Solve for x
    x = 302,312.29/617.22
  6. Step 6: Final answer
    x = 489.80

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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.