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Finding the Fourth Proportional to 1,322.36, 1,983.46 and 348.44

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Solution

The fourth proportional to 1,322.36, 1,983.46 and 348.44 is: 522.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,322.36 : 1,983.46 = 348.44 : x
  2. Step 2: Convert to fraction form
    1,322.36/1,983.46 = 348.44/x
  3. Step 3: Cross multiply
    1,322.36x = 1,983.46 × 348.44
  4. Step 4: Simplify right side
    1,322.36x = 691,116.80
  5. Step 5: Solve for x
    x = 691,116.80/1,322.36
  6. Step 6: Final answer
    x = 522.64

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1.5x scale

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.