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Finding the Fourth Proportional to 1,868.72, 2,803.36 and 636.30

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Solution

The fourth proportional to 1,868.72, 2,803.36 and 636.30 is: 954.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,868.72 : 2,803.36 = 636.30 : x
  2. Step 2: Convert to fraction form
    1,868.72/2,803.36 = 636.30/x
  3. Step 3: Cross multiply
    1,868.72x = 2,803.36 × 636.30
  4. Step 4: Simplify right side
    1,868.72x = 1,783,777.97
  5. Step 5: Solve for x
    x = 1,783,777.97/1,868.72
  6. Step 6: Final answer
    x = 954.55

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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.