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Finding the Fourth Proportional to 667.56, 919.68 and 550.92

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Solution

The fourth proportional to 667.56, 919.68 and 550.92 is: 758.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    667.56 : 919.68 = 550.92 : x
  2. Step 2: Convert to fraction form
    667.56/919.68 = 550.92/x
  3. Step 3: Cross multiply
    667.56x = 919.68 × 550.92
  4. Step 4: Simplify right side
    667.56x = 506,670.11
  5. Step 5: Solve for x
    x = 506,670.11/667.56
  6. Step 6: Final answer
    x = 758.99

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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.