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Finding the Fourth Proportional to 4,704.08, 6,489.60 and 2,840

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Solution

The fourth proportional to 4,704.08, 6,489.60 and 2,840 is: 3,917.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,704.08 : 6,489.60 = 2,840 : x
  2. Step 2: Convert to fraction form
    4,704.08/6,489.60 = 2,840/x
  3. Step 3: Cross multiply
    4,704.08x = 6,489.60 × 2,840
  4. Step 4: Simplify right side
    4,704.08x = 18,430,464
  5. Step 5: Solve for x
    x = 18,430,464/4,704.08
  6. Step 6: Final answer
    x = 3,917.97

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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.