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Finding the Fourth Proportional to 550.29, 756.59 and 490.72

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Solution

The fourth proportional to 550.29, 756.59 and 490.72 is: 674.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    550.29 : 756.59 = 490.72 : x
  2. Step 2: Convert to fraction form
    550.29/756.59 = 490.72/x
  3. Step 3: Cross multiply
    550.29x = 756.59 × 490.72
  4. Step 4: Simplify right side
    550.29x = 371,273.84
  5. Step 5: Solve for x
    x = 371,273.84/550.29
  6. Step 6: Final answer
    x = 674.69

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.