Home / 2,621.79-3,620.16-2,031.30

Finding the Fourth Proportional to 2,621.79, 3,620.16 and 2,031.30

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Solution

The fourth proportional to 2,621.79, 3,620.16 and 2,031.30 is: 2,804.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,621.79 : 3,620.16 = 2,031.30 : x
  2. Step 2: Convert to fraction form
    2,621.79/3,620.16 = 2,031.30/x
  3. Step 3: Cross multiply
    2,621.79x = 3,620.16 × 2,031.30
  4. Step 4: Simplify right side
    2,621.79x = 7,353,631.01
  5. Step 5: Solve for x
    x = 7,353,631.01/2,621.79
  6. Step 6: Final answer
    x = 2,804.81

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.