Home / 2,206.50-3,045.02-1,211.78

Finding the Fourth Proportional to 2,206.50, 3,045.02 and 1,211.78

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Solution

The fourth proportional to 2,206.50, 3,045.02 and 1,211.78 is: 1,672.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,206.50 : 3,045.02 = 1,211.78 : x
  2. Step 2: Convert to fraction form
    2,206.50/3,045.02 = 1,211.78/x
  3. Step 3: Cross multiply
    2,206.50x = 3,045.02 × 1,211.78
  4. Step 4: Simplify right side
    2,206.50x = 3,689,892.45
  5. Step 5: Solve for x
    x = 3,689,892.45/2,206.50
  6. Step 6: Final answer
    x = 1,672.28

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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.