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Finding the Fourth Proportional to 3,799.70, 5,235.81 and 2,803.40

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Solution

The fourth proportional to 3,799.70, 5,235.81 and 2,803.40 is: 3,862.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,799.70 : 5,235.81 = 2,803.40 : x
  2. Step 2: Convert to fraction form
    3,799.70/5,235.81 = 2,803.40/x
  3. Step 3: Cross multiply
    3,799.70x = 5,235.81 × 2,803.40
  4. Step 4: Simplify right side
    3,799.70x = 14,678,069.75
  5. Step 5: Solve for x
    x = 14,678,069.75/3,799.70
  6. Step 6: Final answer
    x = 3,862.95

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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.