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Finding the Fourth Proportional to 615.65, 850.00 and 449.57

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Solution

The fourth proportional to 615.65, 850.00 and 449.57 is: 620.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.65 : 850.00 = 449.57 : x
  2. Step 2: Convert to fraction form
    615.65/850.00 = 449.57/x
  3. Step 3: Cross multiply
    615.65x = 850.00 × 449.57
  4. Step 4: Simplify right side
    615.65x = 382,135.50
  5. Step 5: Solve for x
    x = 382,135.50/615.65
  6. Step 6: Final answer
    x = 620.70

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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.