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Finding the Fourth Proportional to 816.13, 1,224.80 and 508.43

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Solution

The fourth proportional to 816.13, 1,224.80 and 508.43 is: 763.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    816.13 : 1,224.80 = 508.43 : x
  2. Step 2: Convert to fraction form
    816.13/1,224.80 = 508.43/x
  3. Step 3: Cross multiply
    816.13x = 1,224.80 × 508.43
  4. Step 4: Simplify right side
    816.13x = 622,725.06
  5. Step 5: Solve for x
    x = 622,725.06/816.13
  6. Step 6: Final answer
    x = 763.02

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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.