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Finding the Fourth Proportional to 843.90, 1,263.58 and 550.68

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Solution

The fourth proportional to 843.90, 1,263.58 and 550.68 is: 824.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    843.90 : 1,263.58 = 550.68 : x
  2. Step 2: Convert to fraction form
    843.90/1,263.58 = 550.68/x
  3. Step 3: Cross multiply
    843.90x = 1,263.58 × 550.68
  4. Step 4: Simplify right side
    843.90x = 695,823.29
  5. Step 5: Solve for x
    x = 695,823.29/843.90
  6. Step 6: Final answer
    x = 824.53

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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.