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Finding the Fourth Proportional to 823.50, 1,238.09 and 755.19

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Solution

The fourth proportional to 823.50, 1,238.09 and 755.19 is: 1,135.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    823.50 : 1,238.09 = 755.19 : x
  2. Step 2: Convert to fraction form
    823.50/1,238.09 = 755.19/x
  3. Step 3: Cross multiply
    823.50x = 1,238.09 × 755.19
  4. Step 4: Simplify right side
    823.50x = 934,989.41
  5. Step 5: Solve for x
    x = 934,989.41/823.50
  6. Step 6: Final answer
    x = 1,135.38

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1.5x scale

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.