Home / 2,558.40-3,830.88-1,981.76

Finding the Fourth Proportional to 2,558.40, 3,830.88 and 1,981.76

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Solution

The fourth proportional to 2,558.40, 3,830.88 and 1,981.76 is: 2,967.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,558.40 : 3,830.88 = 1,981.76 : x
  2. Step 2: Convert to fraction form
    2,558.40/3,830.88 = 1,981.76/x
  3. Step 3: Cross multiply
    2,558.40x = 3,830.88 × 1,981.76
  4. Step 4: Simplify right side
    2,558.40x = 7,591,884.75
  5. Step 5: Solve for x
    x = 7,591,884.75/2,558.40
  6. Step 6: Final answer
    x = 2,967.43

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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.