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Finding the Fourth Proportional to 2,811.71, 3,880.29 and 1,692.99

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Solution

The fourth proportional to 2,811.71, 3,880.29 and 1,692.99 is: 2,336.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,811.71 : 3,880.29 = 1,692.99 : x
  2. Step 2: Convert to fraction form
    2,811.71/3,880.29 = 1,692.99/x
  3. Step 3: Cross multiply
    2,811.71x = 3,880.29 × 1,692.99
  4. Step 4: Simplify right side
    2,811.71x = 6,569,292.17
  5. Step 5: Solve for x
    x = 6,569,292.17/2,811.71
  6. Step 6: Final answer
    x = 2,336.41

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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.