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Finding the Fourth Proportional to 425.33, 636.77 and 317.60

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Solution

The fourth proportional to 425.33, 636.77 and 317.60 is: 475.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    425.33 : 636.77 = 317.60 : x
  2. Step 2: Convert to fraction form
    425.33/636.77 = 317.60/x
  3. Step 3: Cross multiply
    425.33x = 636.77 × 317.60
  4. Step 4: Simplify right side
    425.33x = 202,233.38
  5. Step 5: Solve for x
    x = 202,233.38/425.33
  6. Step 6: Final answer
    x = 475.48

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.