Home / 3,885.40-5,360.64-2,206.72

Finding the Fourth Proportional to 3,885.40, 5,360.64 and 2,206.72

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Solution

The fourth proportional to 3,885.40, 5,360.64 and 2,206.72 is: 3,044.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,885.40 : 5,360.64 = 2,206.72 : x
  2. Step 2: Convert to fraction form
    3,885.40/5,360.64 = 2,206.72/x
  3. Step 3: Cross multiply
    3,885.40x = 5,360.64 × 2,206.72
  4. Step 4: Simplify right side
    3,885.40x = 11,829,431.50
  5. Step 5: Solve for x
    x = 11,829,431.50/3,885.40
  6. Step 6: Final answer
    x = 3,044.59

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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.