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Finding the Fourth Proportional to 843.18, 1,264.50 and 355.68

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Solution

The fourth proportional to 843.18, 1,264.50 and 355.68 is: 533.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    843.18 : 1,264.50 = 355.68 : x
  2. Step 2: Convert to fraction form
    843.18/1,264.50 = 355.68/x
  3. Step 3: Cross multiply
    843.18x = 1,264.50 × 355.68
  4. Step 4: Simplify right side
    843.18x = 449,757.36
  5. Step 5: Solve for x
    x = 449,757.36/843.18
  6. Step 6: Final answer
    x = 533.41

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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.