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Finding the Fourth Proportional to 2,584.40, 3,878.40 and 1,662.20

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Solution

The fourth proportional to 2,584.40, 3,878.40 and 1,662.20 is: 2,494.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,584.40 : 3,878.40 = 1,662.20 : x
  2. Step 2: Convert to fraction form
    2,584.40/3,878.40 = 1,662.20/x
  3. Step 3: Cross multiply
    2,584.40x = 3,878.40 × 1,662.20
  4. Step 4: Simplify right side
    2,584.40x = 6,446,676.48
  5. Step 5: Solve for x
    x = 6,446,676.48/2,584.40
  6. Step 6: Final answer
    x = 2,494.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.