Home / 1,982.40-2,739.60-1,627.76

Finding the Fourth Proportional to 1,982.40, 2,739.60 and 1,627.76

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Solution

The fourth proportional to 1,982.40, 2,739.60 and 1,627.76 is: 2,249.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,982.40 : 2,739.60 = 1,627.76 : x
  2. Step 2: Convert to fraction form
    1,982.40/2,739.60 = 1,627.76/x
  3. Step 3: Cross multiply
    1,982.40x = 2,739.60 × 1,627.76
  4. Step 4: Simplify right side
    1,982.40x = 4,459,397.60
  5. Step 5: Solve for x
    x = 4,459,397.60/1,982.40
  6. Step 6: Final answer
    x = 2,249.49

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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.