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Finding the Fourth Proportional to 550.45, 759.58 and 403.71

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Solution

The fourth proportional to 550.45, 759.58 and 403.71 is: 557.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    550.45 : 759.58 = 403.71 : x
  2. Step 2: Convert to fraction form
    550.45/759.58 = 403.71/x
  3. Step 3: Cross multiply
    550.45x = 759.58 × 403.71
  4. Step 4: Simplify right side
    550.45x = 306,650.04
  5. Step 5: Solve for x
    x = 306,650.04/550.45
  6. Step 6: Final answer
    x = 557.09

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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.