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Finding the Fourth Proportional to 823.40, 1,137.26 and 528.92

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Solution

The fourth proportional to 823.40, 1,137.26 and 528.92 is: 730.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    823.40 : 1,137.26 = 528.92 : x
  2. Step 2: Convert to fraction form
    823.40/1,137.26 = 528.92/x
  3. Step 3: Cross multiply
    823.40x = 1,137.26 × 528.92
  4. Step 4: Simplify right side
    823.40x = 601,519.56
  5. Step 5: Solve for x
    x = 601,519.56/823.40
  6. Step 6: Final answer
    x = 730.53

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.