Home / 3,122.60-4,315.32-2,790.45

Finding the Fourth Proportional to 3,122.60, 4,315.32 and 2,790.45

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Solution

The fourth proportional to 3,122.60, 4,315.32 and 2,790.45 is: 3,856.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,122.60 : 4,315.32 = 2,790.45 : x
  2. Step 2: Convert to fraction form
    3,122.60/4,315.32 = 2,790.45/x
  3. Step 3: Cross multiply
    3,122.60x = 4,315.32 × 2,790.45
  4. Step 4: Simplify right side
    3,122.60x = 12,041,684.69
  5. Step 5: Solve for x
    x = 12,041,684.69/3,122.60
  6. Step 6: Final answer
    x = 3,856.31

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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.