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Finding the Fourth Proportional to 617.67, 851.79 and 477.55

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Solution

The fourth proportional to 617.67, 851.79 and 477.55 is: 658.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.67 : 851.79 = 477.55 : x
  2. Step 2: Convert to fraction form
    617.67/851.79 = 477.55/x
  3. Step 3: Cross multiply
    617.67x = 851.79 × 477.55
  4. Step 4: Simplify right side
    617.67x = 406,772.31
  5. Step 5: Solve for x
    x = 406,772.31/617.67
  6. Step 6: Final answer
    x = 658.56

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1.5x scale

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.