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Finding the Fourth Proportional to 4,885.72, 6,742.40 and 2,790.04

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Solution

The fourth proportional to 4,885.72, 6,742.40 and 2,790.04 is: 3,850.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,885.72 : 6,742.40 = 2,790.04 : x
  2. Step 2: Convert to fraction form
    4,885.72/6,742.40 = 2,790.04/x
  3. Step 3: Cross multiply
    4,885.72x = 6,742.40 × 2,790.04
  4. Step 4: Simplify right side
    4,885.72x = 18,811,565.70
  5. Step 5: Solve for x
    x = 18,811,565.70/4,885.72
  6. Step 6: Final answer
    x = 3,850.32

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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.