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Finding the Fourth Proportional to 550.63, 759.87 and 317.89

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Solution

The fourth proportional to 550.63, 759.87 and 317.89 is: 438.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    550.63 : 759.87 = 317.89 : x
  2. Step 2: Convert to fraction form
    550.63/759.87 = 317.89/x
  3. Step 3: Cross multiply
    550.63x = 759.87 × 317.89
  4. Step 4: Simplify right side
    550.63x = 241,549.69
  5. Step 5: Solve for x
    x = 241,549.69/550.63
  6. Step 6: Final answer
    x = 438.68

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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.