Home / 3,121.11-4,681.58-1,271.77

Finding the Fourth Proportional to 3,121.11, 4,681.58 and 1,271.77

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Solution

The fourth proportional to 3,121.11, 4,681.58 and 1,271.77 is: 1,907.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.11 : 4,681.58 = 1,271.77 : x
  2. Step 2: Convert to fraction form
    3,121.11/4,681.58 = 1,271.77/x
  3. Step 3: Cross multiply
    3,121.11x = 4,681.58 × 1,271.77
  4. Step 4: Simplify right side
    3,121.11x = 5,953,889.82
  5. Step 5: Solve for x
    x = 5,953,889.82/3,121.11
  6. Step 6: Final answer
    x = 1,907.62

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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.