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Finding the Fourth Proportional to 2,776.68, 4,163.40 and 1,620

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Solution

The fourth proportional to 2,776.68, 4,163.40 and 1,620 is: 2,429.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,776.68 : 4,163.40 = 1,620 : x
  2. Step 2: Convert to fraction form
    2,776.68/4,163.40 = 1,620/x
  3. Step 3: Cross multiply
    2,776.68x = 4,163.40 × 1,620
  4. Step 4: Simplify right side
    2,776.68x = 6,744,708.00
  5. Step 5: Solve for x
    x = 6,744,708.00/2,776.68
  6. Step 6: Final answer
    x = 2,429.05

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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.