Home / 2,688.87-4,000.77-2,621.91

Finding the Fourth Proportional to 2,688.87, 4,000.77 and 2,621.91

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Solution

The fourth proportional to 2,688.87, 4,000.77 and 2,621.91 is: 3,901.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,688.87 : 4,000.77 = 2,621.91 : x
  2. Step 2: Convert to fraction form
    2,688.87/4,000.77 = 2,621.91/x
  3. Step 3: Cross multiply
    2,688.87x = 4,000.77 × 2,621.91
  4. Step 4: Simplify right side
    2,688.87x = 10,489,658.87
  5. Step 5: Solve for x
    x = 10,489,658.87/2,688.87
  6. Step 6: Final answer
    x = 3,901.14

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.