Home / 2,155.53-2,974.90-1,316.05

Finding the Fourth Proportional to 2,155.53, 2,974.90 and 1,316.05

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Solution

The fourth proportional to 2,155.53, 2,974.90 and 1,316.05 is: 1,816.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,155.53 : 2,974.90 = 1,316.05 : x
  2. Step 2: Convert to fraction form
    2,155.53/2,974.90 = 1,316.05/x
  3. Step 3: Cross multiply
    2,155.53x = 2,974.90 × 1,316.05
  4. Step 4: Simplify right side
    2,155.53x = 3,915,120.44
  5. Step 5: Solve for x
    x = 3,915,120.44/2,155.53
  6. Step 6: Final answer
    x = 1,816.32

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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.