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Finding the Fourth Proportional to 550.75, 760.08 and 314.79

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Solution

The fourth proportional to 550.75, 760.08 and 314.79 is: 434.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    550.75 : 760.08 = 314.79 : x
  2. Step 2: Convert to fraction form
    550.75/760.08 = 314.79/x
  3. Step 3: Cross multiply
    550.75x = 760.08 × 314.79
  4. Step 4: Simplify right side
    550.75x = 239,263.91
  5. Step 5: Solve for x
    x = 239,263.91/550.75
  6. Step 6: Final answer
    x = 434.43

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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.