Home / 1,961.65-2,938.83-1,638.46

Finding the Fourth Proportional to 1,961.65, 2,938.83 and 1,638.46

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Solution

The fourth proportional to 1,961.65, 2,938.83 and 1,638.46 is: 2,454.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,961.65 : 2,938.83 = 1,638.46 : x
  2. Step 2: Convert to fraction form
    1,961.65/2,938.83 = 1,638.46/x
  3. Step 3: Cross multiply
    1,961.65x = 2,938.83 × 1,638.46
  4. Step 4: Simplify right side
    1,961.65x = 4,815,155.40
  5. Step 5: Solve for x
    x = 4,815,155.40/1,961.65
  6. Step 6: Final answer
    x = 2,454.65

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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.