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Finding the Fourth Proportional to 1,322.22, 1,983.25 and 348.32

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Solution

The fourth proportional to 1,322.22, 1,983.25 and 348.32 is: 522.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,322.22 : 1,983.25 = 348.32 : x
  2. Step 2: Convert to fraction form
    1,322.22/1,983.25 = 348.32/x
  3. Step 3: Cross multiply
    1,322.22x = 1,983.25 × 348.32
  4. Step 4: Simplify right side
    1,322.22x = 690,805.64
  5. Step 5: Solve for x
    x = 690,805.64/1,322.22
  6. Step 6: Final answer
    x = 522.46

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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.