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Finding the Fourth Proportional to 4,991.85, 7,487.99 and 1,871.04

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Solution

The fourth proportional to 4,991.85, 7,487.99 and 1,871.04 is: 2,806.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,991.85 : 7,487.99 = 1,871.04 : x
  2. Step 2: Convert to fraction form
    4,991.85/7,487.99 = 1,871.04/x
  3. Step 3: Cross multiply
    4,991.85x = 7,487.99 × 1,871.04
  4. Step 4: Simplify right side
    4,991.85x = 14,010,319.45
  5. Step 5: Solve for x
    x = 14,010,319.45/4,991.85
  6. Step 6: Final answer
    x = 2,806.64

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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.