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Finding the Fourth Proportional to 3,376.89, 4,672.89 and 2,878.74

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Solution

The fourth proportional to 3,376.89, 4,672.89 and 2,878.74 is: 3,983.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,376.89 : 4,672.89 = 2,878.74 : x
  2. Step 2: Convert to fraction form
    3,376.89/4,672.89 = 2,878.74/x
  3. Step 3: Cross multiply
    3,376.89x = 4,672.89 × 2,878.74
  4. Step 4: Simplify right side
    3,376.89x = 13,452,035.36
  5. Step 5: Solve for x
    x = 13,452,035.36/3,376.89
  6. Step 6: Final answer
    x = 3,983.56

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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.