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Finding the Fourth Proportional to 4,877.89, 6,731.44 and 2,639.73

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Solution

The fourth proportional to 4,877.89, 6,731.44 and 2,639.73 is: 3,642.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,877.89 : 6,731.44 = 2,639.73 : x
  2. Step 2: Convert to fraction form
    4,877.89/6,731.44 = 2,639.73/x
  3. Step 3: Cross multiply
    4,877.89x = 6,731.44 × 2,639.73
  4. Step 4: Simplify right side
    4,877.89x = 17,769,164.89
  5. Step 5: Solve for x
    x = 17,769,164.89/4,877.89
  6. Step 6: Final answer
    x = 3,642.80

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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.