Home / 3,222.79-4,447.20-1,806.40

Finding the Fourth Proportional to 3,222.79, 4,447.20 and 1,806.40

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Solution

The fourth proportional to 3,222.79, 4,447.20 and 1,806.40 is: 2,492.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,222.79 : 4,447.20 = 1,806.40 : x
  2. Step 2: Convert to fraction form
    3,222.79/4,447.20 = 1,806.40/x
  3. Step 3: Cross multiply
    3,222.79x = 4,447.20 × 1,806.40
  4. Step 4: Simplify right side
    3,222.79x = 8,033,434.41
  5. Step 5: Solve for x
    x = 8,033,434.41/3,222.79
  6. Step 6: Final answer
    x = 2,492.70

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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.