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Finding the Fourth Proportional to 550.40, 759.81 and 340.74

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Solution

The fourth proportional to 550.40, 759.81 and 340.74 is: 470.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    550.40 : 759.81 = 340.74 : x
  2. Step 2: Convert to fraction form
    550.40/759.81 = 340.74/x
  3. Step 3: Cross multiply
    550.40x = 759.81 × 340.74
  4. Step 4: Simplify right side
    550.40x = 258,898.94
  5. Step 5: Solve for x
    x = 258,898.94/550.40
  6. Step 6: Final answer
    x = 470.39

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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.