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Finding the Fourth Proportional to 617.06, 851.55 and 355.13

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Solution

The fourth proportional to 617.06, 851.55 and 355.13 is: 490.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.06 : 851.55 = 355.13 : x
  2. Step 2: Convert to fraction form
    617.06/851.55 = 355.13/x
  3. Step 3: Cross multiply
    617.06x = 851.55 × 355.13
  4. Step 4: Simplify right side
    617.06x = 302,413.08
  5. Step 5: Solve for x
    x = 302,413.08/617.06
  6. Step 6: Final answer
    x = 490.09

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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.