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Finding the Fourth Proportional to 2,716, 4,074.20 and 1,990.16

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Solution

The fourth proportional to 2,716, 4,074.20 and 1,990.16 is: 2,985.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,716 : 4,074.20 = 1,990.16 : x
  2. Step 2: Convert to fraction form
    2,716/4,074.20 = 1,990.16/x
  3. Step 3: Cross multiply
    2,716x = 4,074.20 × 1,990.16
  4. Step 4: Simplify right side
    2,716x = 8,108,309.87
  5. Step 5: Solve for x
    x = 8,108,309.87/2,716
  6. Step 6: Final answer
    x = 2,985.39

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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.