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Finding the Fourth Proportional to 3,378.51, 5,055.01 and 1,992.60

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Solution

The fourth proportional to 3,378.51, 5,055.01 and 1,992.60 is: 2,981.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,378.51 : 5,055.01 = 1,992.60 : x
  2. Step 2: Convert to fraction form
    3,378.51/5,055.01 = 1,992.60/x
  3. Step 3: Cross multiply
    3,378.51x = 5,055.01 × 1,992.60
  4. Step 4: Simplify right side
    3,378.51x = 10,072,607.94
  5. Step 5: Solve for x
    x = 10,072,607.94/3,378.51
  6. Step 6: Final answer
    x = 2,981.38

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1.5x scale

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.