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Finding the Fourth Proportional to 3,911.90, 5,868.68 and 2,999.03

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Solution

The fourth proportional to 3,911.90, 5,868.68 and 2,999.03 is: 4,499.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,911.90 : 5,868.68 = 2,999.03 : x
  2. Step 2: Convert to fraction form
    3,911.90/5,868.68 = 2,999.03/x
  3. Step 3: Cross multiply
    3,911.90x = 5,868.68 × 2,999.03
  4. Step 4: Simplify right side
    3,911.90x = 17,600,303.04
  5. Step 5: Solve for x
    x = 17,600,303.04/3,911.90
  6. Step 6: Final answer
    x = 4,499.18

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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.