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Finding the Fourth Proportional to 617.67, 851.85 and 451.85

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Solution

The fourth proportional to 617.67, 851.85 and 451.85 is: 623.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.67 : 851.85 = 451.85 : x
  2. Step 2: Convert to fraction form
    617.67/851.85 = 451.85/x
  3. Step 3: Cross multiply
    617.67x = 851.85 × 451.85
  4. Step 4: Simplify right side
    617.67x = 384,904.16
  5. Step 5: Solve for x
    x = 384,904.16/617.67
  6. Step 6: Final answer
    x = 623.16

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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.