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Finding the Fourth Proportional to 550.89, 759.60 and 499.05

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Solution

The fourth proportional to 550.89, 759.60 and 499.05 is: 688.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    550.89 : 759.60 = 499.05 : x
  2. Step 2: Convert to fraction form
    550.89/759.60 = 499.05/x
  3. Step 3: Cross multiply
    550.89x = 759.60 × 499.05
  4. Step 4: Simplify right side
    550.89x = 379,078.38
  5. Step 5: Solve for x
    x = 379,078.38/550.89
  6. Step 6: Final answer
    x = 688.12

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1.5x scale

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.