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Finding the Fourth Proportional to 1,223.79, 1,834.53 and 443.60

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Solution

The fourth proportional to 1,223.79, 1,834.53 and 443.60 is: 664.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,223.79 : 1,834.53 = 443.60 : x
  2. Step 2: Convert to fraction form
    1,223.79/1,834.53 = 443.60/x
  3. Step 3: Cross multiply
    1,223.79x = 1,834.53 × 443.60
  4. Step 4: Simplify right side
    1,223.79x = 813,788.34
  5. Step 5: Solve for x
    x = 813,788.34/1,223.79
  6. Step 6: Final answer
    x = 664.97

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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.