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Finding the Fourth Proportional to 615.50, 850.60 and 504.80

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Solution

The fourth proportional to 615.50, 850.60 and 504.80 is: 697.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.50 : 850.60 = 504.80 : x
  2. Step 2: Convert to fraction form
    615.50/850.60 = 504.80/x
  3. Step 3: Cross multiply
    615.50x = 850.60 × 504.80
  4. Step 4: Simplify right side
    615.50x = 429,382.88
  5. Step 5: Solve for x
    x = 429,382.88/615.50
  6. Step 6: Final answer
    x = 697.62

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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.