Home / 2,115.12-2,919.01-1,170.95

Finding the Fourth Proportional to 2,115.12, 2,919.01 and 1,170.95

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Solution

The fourth proportional to 2,115.12, 2,919.01 and 1,170.95 is: 1,615.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.12 : 2,919.01 = 1,170.95 : x
  2. Step 2: Convert to fraction form
    2,115.12/2,919.01 = 1,170.95/x
  3. Step 3: Cross multiply
    2,115.12x = 2,919.01 × 1,170.95
  4. Step 4: Simplify right side
    2,115.12x = 3,418,014.76
  5. Step 5: Solve for x
    x = 3,418,014.76/2,115.12
  6. Step 6: Final answer
    x = 1,615.99

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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.