Home / 2,688.05-3,729.75-2,611.50

Finding the Fourth Proportional to 2,688.05, 3,729.75 and 2,611.50

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Solution

The fourth proportional to 2,688.05, 3,729.75 and 2,611.50 is: 3,623.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,688.05 : 3,729.75 = 2,611.50 : x
  2. Step 2: Convert to fraction form
    2,688.05/3,729.75 = 2,611.50/x
  3. Step 3: Cross multiply
    2,688.05x = 3,729.75 × 2,611.50
  4. Step 4: Simplify right side
    2,688.05x = 9,740,242.13
  5. Step 5: Solve for x
    x = 9,740,242.13/2,688.05
  6. Step 6: Final answer
    x = 3,623.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.