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Finding the Fourth Proportional to 2,161.68, 3,242.55 and 622.68

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Solution

The fourth proportional to 2,161.68, 3,242.55 and 622.68 is: 934.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,161.68 : 3,242.55 = 622.68 : x
  2. Step 2: Convert to fraction form
    2,161.68/3,242.55 = 622.68/x
  3. Step 3: Cross multiply
    2,161.68x = 3,242.55 × 622.68
  4. Step 4: Simplify right side
    2,161.68x = 2,019,071.03
  5. Step 5: Solve for x
    x = 2,019,071.03/2,161.68
  6. Step 6: Final answer
    x = 934.03

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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.