Home / 2,115-2,919.33-1,485.70

Finding the Fourth Proportional to 2,115, 2,919.33 and 1,485.70

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Solution

The fourth proportional to 2,115, 2,919.33 and 1,485.70 is: 2,050.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115 : 2,919.33 = 1,485.70 : x
  2. Step 2: Convert to fraction form
    2,115/2,919.33 = 1,485.70/x
  3. Step 3: Cross multiply
    2,115x = 2,919.33 × 1,485.70
  4. Step 4: Simplify right side
    2,115x = 4,337,241.28
  5. Step 5: Solve for x
    x = 4,337,241.28/2,115
  6. Step 6: Final answer
    x = 2,050.71

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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.