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Finding the Fourth Proportional to 828.80, 1,240.50 and 609.37

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Solution

The fourth proportional to 828.80, 1,240.50 and 609.37 is: 912.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    828.80 : 1,240.50 = 609.37 : x
  2. Step 2: Convert to fraction form
    828.80/1,240.50 = 609.37/x
  3. Step 3: Cross multiply
    828.80x = 1,240.50 × 609.37
  4. Step 4: Simplify right side
    828.80x = 755,920.44
  5. Step 5: Solve for x
    x = 755,920.44/828.80
  6. Step 6: Final answer
    x = 912.07

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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.