Home / 2,191.05-3,285.36-1,931.65

Finding the Fourth Proportional to 2,191.05, 3,285.36 and 1,931.65

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Solution

The fourth proportional to 2,191.05, 3,285.36 and 1,931.65 is: 2,896.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,191.05 : 3,285.36 = 1,931.65 : x
  2. Step 2: Convert to fraction form
    2,191.05/3,285.36 = 1,931.65/x
  3. Step 3: Cross multiply
    2,191.05x = 3,285.36 × 1,931.65
  4. Step 4: Simplify right side
    2,191.05x = 6,346,157.43
  5. Step 5: Solve for x
    x = 6,346,157.43/2,191.05
  6. Step 6: Final answer
    x = 2,896.40

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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.