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Finding the Fourth Proportional to 1,199.80, 1,800.31 and 550.99

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Solution

The fourth proportional to 1,199.80, 1,800.31 and 550.99 is: 826.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,199.80 : 1,800.31 = 550.99 : x
  2. Step 2: Convert to fraction form
    1,199.80/1,800.31 = 550.99/x
  3. Step 3: Cross multiply
    1,199.80x = 1,800.31 × 550.99
  4. Step 4: Simplify right side
    1,199.80x = 991,954.71
  5. Step 5: Solve for x
    x = 991,954.71/1,199.80
  6. Step 6: Final answer
    x = 826.77

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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.