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Finding the Fourth Proportional to 550.68, 760.05 and 317.82

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Solution

The fourth proportional to 550.68, 760.05 and 317.82 is: 438.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    550.68 : 760.05 = 317.82 : x
  2. Step 2: Convert to fraction form
    550.68/760.05 = 317.82/x
  3. Step 3: Cross multiply
    550.68x = 760.05 × 317.82
  4. Step 4: Simplify right side
    550.68x = 241,559.09
  5. Step 5: Solve for x
    x = 241,559.09/550.68
  6. Step 6: Final answer
    x = 438.66

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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.