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Finding the Fourth Proportional to 3,400.61, 4,692.80 and 1,908.50

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Solution

The fourth proportional to 3,400.61, 4,692.80 and 1,908.50 is: 2,633.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,400.61 : 4,692.80 = 1,908.50 : x
  2. Step 2: Convert to fraction form
    3,400.61/4,692.80 = 1,908.50/x
  3. Step 3: Cross multiply
    3,400.61x = 4,692.80 × 1,908.50
  4. Step 4: Simplify right side
    3,400.61x = 8,956,199.26
  5. Step 5: Solve for x
    x = 8,956,199.26/3,400.61
  6. Step 6: Final answer
    x = 2,633.70

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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.