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Finding the Fourth Proportional to 1,622.43, 2,239.11 and 993.06

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Solution

The fourth proportional to 1,622.43, 2,239.11 and 993.06 is: 1,370.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,622.43 : 2,239.11 = 993.06 : x
  2. Step 2: Convert to fraction form
    1,622.43/2,239.11 = 993.06/x
  3. Step 3: Cross multiply
    1,622.43x = 2,239.11 × 993.06
  4. Step 4: Simplify right side
    1,622.43x = 2,223,570.58
  5. Step 5: Solve for x
    x = 2,223,570.58/1,622.43
  6. Step 6: Final answer
    x = 1,370.52

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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.