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Finding the Fourth Proportional to 617.86, 853.05 and 471.25

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Solution

The fourth proportional to 617.86, 853.05 and 471.25 is: 650.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    617.86 : 853.05 = 471.25 : x
  2. Step 2: Convert to fraction form
    617.86/853.05 = 471.25/x
  3. Step 3: Cross multiply
    617.86x = 853.05 × 471.25
  4. Step 4: Simplify right side
    617.86x = 401,999.81
  5. Step 5: Solve for x
    x = 401,999.81/617.86
  6. Step 6: Final answer
    x = 650.63

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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.