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Finding the Fourth Proportional to 550.87, 826.31 and 487.09

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Solution

The fourth proportional to 550.87, 826.31 and 487.09 is: 730.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    550.87 : 826.31 = 487.09 : x
  2. Step 2: Convert to fraction form
    550.87/826.31 = 487.09/x
  3. Step 3: Cross multiply
    550.87x = 826.31 × 487.09
  4. Step 4: Simplify right side
    550.87x = 402,487.34
  5. Step 5: Solve for x
    x = 402,487.34/550.87
  6. Step 6: Final answer
    x = 730.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.