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Finding the Fourth Proportional to 615.85, 919.01 and 550.14

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Solution

The fourth proportional to 615.85, 919.01 and 550.14 is: 820.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.85 : 919.01 = 550.14 : x
  2. Step 2: Convert to fraction form
    615.85/919.01 = 550.14/x
  3. Step 3: Cross multiply
    615.85x = 919.01 × 550.14
  4. Step 4: Simplify right side
    615.85x = 505,584.17
  5. Step 5: Solve for x
    x = 505,584.17/615.85
  6. Step 6: Final answer
    x = 820.96

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.