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Finding the Fourth Proportional to 2,161.50, 3,242.79 and 622.50

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Solution

The fourth proportional to 2,161.50, 3,242.79 and 622.50 is: 933.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,161.50 : 3,242.79 = 622.50 : x
  2. Step 2: Convert to fraction form
    2,161.50/3,242.79 = 622.50/x
  3. Step 3: Cross multiply
    2,161.50x = 3,242.79 × 622.50
  4. Step 4: Simplify right side
    2,161.50x = 2,018,636.78
  5. Step 5: Solve for x
    x = 2,018,636.78/2,161.50
  6. Step 6: Final answer
    x = 933.91

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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.