Home / 2,715.40-4,069.38-1,981.54

Finding the Fourth Proportional to 2,715.40, 4,069.38 and 1,981.54

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Solution

The fourth proportional to 2,715.40, 4,069.38 and 1,981.54 is: 2,969.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,715.40 : 4,069.38 = 1,981.54 : x
  2. Step 2: Convert to fraction form
    2,715.40/4,069.38 = 1,981.54/x
  3. Step 3: Cross multiply
    2,715.40x = 4,069.38 × 1,981.54
  4. Step 4: Simplify right side
    2,715.40x = 8,063,639.25
  5. Step 5: Solve for x
    x = 8,063,639.25/2,715.40
  6. Step 6: Final answer
    x = 2,969.60

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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.