Home / 2,115.87-2,920.04-1,171.70

Finding the Fourth Proportional to 2,115.87, 2,920.04 and 1,171.70

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Solution

The fourth proportional to 2,115.87, 2,920.04 and 1,171.70 is: 1,617.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.87 : 2,920.04 = 1,171.70 : x
  2. Step 2: Convert to fraction form
    2,115.87/2,920.04 = 1,171.70/x
  3. Step 3: Cross multiply
    2,115.87x = 2,920.04 × 1,171.70
  4. Step 4: Simplify right side
    2,115.87x = 3,421,410.87
  5. Step 5: Solve for x
    x = 3,421,410.87/2,115.87
  6. Step 6: Final answer
    x = 1,617.02

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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.