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Finding the Fourth Proportional to 3,555.04, 4,906 and 2,157.92

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Solution

The fourth proportional to 3,555.04, 4,906 and 2,157.92 is: 2,977.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,555.04 : 4,906 = 2,157.92 : x
  2. Step 2: Convert to fraction form
    3,555.04/4,906 = 2,157.92/x
  3. Step 3: Cross multiply
    3,555.04x = 4,906 × 2,157.92
  4. Step 4: Simplify right side
    3,555.04x = 10,586,755.52
  5. Step 5: Solve for x
    x = 10,586,755.52/3,555.04
  6. Step 6: Final answer
    x = 2,977.96

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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.