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Finding the Fourth Proportional to 2,662.90, 3,990.36 and 1,771.93

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Solution

The fourth proportional to 2,662.90, 3,990.36 and 1,771.93 is: 2,655.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,662.90 : 3,990.36 = 1,771.93 : x
  2. Step 2: Convert to fraction form
    2,662.90/3,990.36 = 1,771.93/x
  3. Step 3: Cross multiply
    2,662.90x = 3,990.36 × 1,771.93
  4. Step 4: Simplify right side
    2,662.90x = 7,070,627.78
  5. Step 5: Solve for x
    x = 7,070,627.78/2,662.90
  6. Step 6: Final answer
    x = 2,655.24

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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.