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Finding the Fourth Proportional to 828.49, 1,240.27 and 535.43

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Solution

The fourth proportional to 828.49, 1,240.27 and 535.43 is: 801.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    828.49 : 1,240.27 = 535.43 : x
  2. Step 2: Convert to fraction form
    828.49/1,240.27 = 535.43/x
  3. Step 3: Cross multiply
    828.49x = 1,240.27 × 535.43
  4. Step 4: Simplify right side
    828.49x = 664,068.89
  5. Step 5: Solve for x
    x = 664,068.89/828.49
  6. Step 6: Final answer
    x = 801.54

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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.