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Finding the Fourth Proportional to 1,322.86, 1,983.62 and 445.06

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Solution

The fourth proportional to 1,322.86, 1,983.62 and 445.06 is: 667.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,322.86 : 1,983.62 = 445.06 : x
  2. Step 2: Convert to fraction form
    1,322.86/1,983.62 = 445.06/x
  3. Step 3: Cross multiply
    1,322.86x = 1,983.62 × 445.06
  4. Step 4: Simplify right side
    1,322.86x = 882,829.92
  5. Step 5: Solve for x
    x = 882,829.92/1,322.86
  6. Step 6: Final answer
    x = 667.36

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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.