Home / 2,156.11-2,975.40-1,271.59

Finding the Fourth Proportional to 2,156.11, 2,975.40 and 1,271.59

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Solution

The fourth proportional to 2,156.11, 2,975.40 and 1,271.59 is: 1,754.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,156.11 : 2,975.40 = 1,271.59 : x
  2. Step 2: Convert to fraction form
    2,156.11/2,975.40 = 1,271.59/x
  3. Step 3: Cross multiply
    2,156.11x = 2,975.40 × 1,271.59
  4. Step 4: Simplify right side
    2,156.11x = 3,783,467.65
  5. Step 5: Solve for x
    x = 3,783,467.65/2,156.11
  6. Step 6: Final answer
    x = 1,754.77

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1.5x scale

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.