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Finding the Fourth Proportional to 550.61, 760.49 and 438.95

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Solution

The fourth proportional to 550.61, 760.49 and 438.95 is: 606.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    550.61 : 760.49 = 438.95 : x
  2. Step 2: Convert to fraction form
    550.61/760.49 = 438.95/x
  3. Step 3: Cross multiply
    550.61x = 760.49 × 438.95
  4. Step 4: Simplify right side
    550.61x = 333,817.09
  5. Step 5: Solve for x
    x = 333,817.09/550.61
  6. Step 6: Final answer
    x = 606.27

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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.