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Finding the Fourth Proportional to 1,868.09, 2,803.08 and 828.32

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Solution

The fourth proportional to 1,868.09, 2,803.08 and 828.32 is: 1,242.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,868.09 : 2,803.08 = 828.32 : x
  2. Step 2: Convert to fraction form
    1,868.09/2,803.08 = 828.32/x
  3. Step 3: Cross multiply
    1,868.09x = 2,803.08 × 828.32
  4. Step 4: Simplify right side
    1,868.09x = 2,321,847.23
  5. Step 5: Solve for x
    x = 2,321,847.23/1,868.09
  6. Step 6: Final answer
    x = 1,242.90

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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.