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Finding the Fourth Proportional to 817.71, 1,224.53 and 556.75

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Solution

The fourth proportional to 817.71, 1,224.53 and 556.75 is: 833.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    817.71 : 1,224.53 = 556.75 : x
  2. Step 2: Convert to fraction form
    817.71/1,224.53 = 556.75/x
  3. Step 3: Cross multiply
    817.71x = 1,224.53 × 556.75
  4. Step 4: Simplify right side
    817.71x = 681,757.08
  5. Step 5: Solve for x
    x = 681,757.08/817.71
  6. Step 6: Final answer
    x = 833.74

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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.