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Finding the Fourth Proportional to 1,868.97, 2,803.19 and 636.42

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Solution

The fourth proportional to 1,868.97, 2,803.19 and 636.42 is: 954.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,868.97 : 2,803.19 = 636.42 : x
  2. Step 2: Convert to fraction form
    1,868.97/2,803.19 = 636.42/x
  3. Step 3: Cross multiply
    1,868.97x = 2,803.19 × 636.42
  4. Step 4: Simplify right side
    1,868.97x = 1,784,003.00
  5. Step 5: Solve for x
    x = 1,784,003.00/1,868.97
  6. Step 6: Final answer
    x = 954.54

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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.