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Finding the Fourth Proportional to 550.53, 759.76 and 311.32

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Solution

The fourth proportional to 550.53, 759.76 and 311.32 is: 429.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    550.53 : 759.76 = 311.32 : x
  2. Step 2: Convert to fraction form
    550.53/759.76 = 311.32/x
  3. Step 3: Cross multiply
    550.53x = 759.76 × 311.32
  4. Step 4: Simplify right side
    550.53x = 236,526.19
  5. Step 5: Solve for x
    x = 236,526.19/550.53
  6. Step 6: Final answer
    x = 429.64

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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.