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Finding the Fourth Proportional to 1,322.78, 1,825.84 and 763.62

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Solution

The fourth proportional to 1,322.78, 1,825.84 and 763.62 is: 1,054.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,322.78 : 1,825.84 = 763.62 : x
  2. Step 2: Convert to fraction form
    1,322.78/1,825.84 = 763.62/x
  3. Step 3: Cross multiply
    1,322.78x = 1,825.84 × 763.62
  4. Step 4: Simplify right side
    1,322.78x = 1,394,238.81
  5. Step 5: Solve for x
    x = 1,394,238.81/1,322.78
  6. Step 6: Final answer
    x = 1,054.02

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.