Home / 2,912.88-4,368.55-1,988.27

Finding the Fourth Proportional to 2,912.88, 4,368.55 and 1,988.27

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Solution

The fourth proportional to 2,912.88, 4,368.55 and 1,988.27 is: 2,981.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,912.88 : 4,368.55 = 1,988.27 : x
  2. Step 2: Convert to fraction form
    2,912.88/4,368.55 = 1,988.27/x
  3. Step 3: Cross multiply
    2,912.88x = 4,368.55 × 1,988.27
  4. Step 4: Simplify right side
    2,912.88x = 8,685,856.91
  5. Step 5: Solve for x
    x = 8,685,856.91/2,912.88
  6. Step 6: Final answer
    x = 2,981.88

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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.