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Finding the Fourth Proportional to 2,718.81, 3,750.60 and 2,120.22

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Solution

The fourth proportional to 2,718.81, 3,750.60 and 2,120.22 is: 2,924.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,718.81 : 3,750.60 = 2,120.22 : x
  2. Step 2: Convert to fraction form
    2,718.81/3,750.60 = 2,120.22/x
  3. Step 3: Cross multiply
    2,718.81x = 3,750.60 × 2,120.22
  4. Step 4: Simplify right side
    2,718.81x = 7,952,097.13
  5. Step 5: Solve for x
    x = 7,952,097.13/2,718.81
  6. Step 6: Final answer
    x = 2,924.84

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1.5x scale

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.