Home / 1,968.88-2,947.76-1,815.76

Finding the Fourth Proportional to 1,968.88, 2,947.76 and 1,815.76

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Solution

The fourth proportional to 1,968.88, 2,947.76 and 1,815.76 is: 2,718.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,968.88 : 2,947.76 = 1,815.76 : x
  2. Step 2: Convert to fraction form
    1,968.88/2,947.76 = 1,815.76/x
  3. Step 3: Cross multiply
    1,968.88x = 2,947.76 × 1,815.76
  4. Step 4: Simplify right side
    1,968.88x = 5,352,424.70
  5. Step 5: Solve for x
    x = 5,352,424.70/1,968.88
  6. Step 6: Final answer
    x = 2,718.51

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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.