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Finding the Fourth Proportional to 1,022.37, 1,533.55 and 817.35

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Solution

The fourth proportional to 1,022.37, 1,533.55 and 817.35 is: 1,226.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,022.37 : 1,533.55 = 817.35 : x
  2. Step 2: Convert to fraction form
    1,022.37/1,533.55 = 817.35/x
  3. Step 3: Cross multiply
    1,022.37x = 1,533.55 × 817.35
  4. Step 4: Simplify right side
    1,022.37x = 1,253,447.09
  5. Step 5: Solve for x
    x = 1,253,447.09/1,022.37
  6. Step 6: Final answer
    x = 1,226.02

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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.