Home / 2,120.65-3,176.36-1,296.42

Finding the Fourth Proportional to 2,120.65, 3,176.36 and 1,296.42

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Solution

The fourth proportional to 2,120.65, 3,176.36 and 1,296.42 is: 1,941.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,120.65 : 3,176.36 = 1,296.42 : x
  2. Step 2: Convert to fraction form
    2,120.65/3,176.36 = 1,296.42/x
  3. Step 3: Cross multiply
    2,120.65x = 3,176.36 × 1,296.42
  4. Step 4: Simplify right side
    2,120.65x = 4,117,908.26
  5. Step 5: Solve for x
    x = 4,117,908.26/2,120.65
  6. Step 6: Final answer
    x = 1,941.82

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1.5x scale

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.