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Finding the Fourth Proportional to 4,991.86, 7,490.40 and 2,220.52

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Solution

The fourth proportional to 4,991.86, 7,490.40 and 2,220.52 is: 3,331.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,991.86 : 7,490.40 = 2,220.52 : x
  2. Step 2: Convert to fraction form
    4,991.86/7,490.40 = 2,220.52/x
  3. Step 3: Cross multiply
    4,991.86x = 7,490.40 × 2,220.52
  4. Step 4: Simplify right side
    4,991.86x = 16,632,583.01
  5. Step 5: Solve for x
    x = 16,632,583.01/4,991.86
  6. Step 6: Final answer
    x = 3,331.94

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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.