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Finding the Fourth Proportional to 2,878.31, 3,972.04 and 1,636.31

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Solution

The fourth proportional to 2,878.31, 3,972.04 and 1,636.31 is: 2,258.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,878.31 : 3,972.04 = 1,636.31 : x
  2. Step 2: Convert to fraction form
    2,878.31/3,972.04 = 1,636.31/x
  3. Step 3: Cross multiply
    2,878.31x = 3,972.04 × 1,636.31
  4. Step 4: Simplify right side
    2,878.31x = 6,499,460.73
  5. Step 5: Solve for x
    x = 6,499,460.73/2,878.31
  6. Step 6: Final answer
    x = 2,258.09

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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.