Home / 2,638.35-3,639.21-1,692.65

Finding the Fourth Proportional to 2,638.35, 3,639.21 and 1,692.65

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Solution

The fourth proportional to 2,638.35, 3,639.21 and 1,692.65 is: 2,334.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,638.35 : 3,639.21 = 1,692.65 : x
  2. Step 2: Convert to fraction form
    2,638.35/3,639.21 = 1,692.65/x
  3. Step 3: Cross multiply
    2,638.35x = 3,639.21 × 1,692.65
  4. Step 4: Simplify right side
    2,638.35x = 6,159,908.81
  5. Step 5: Solve for x
    x = 6,159,908.81/2,638.35
  6. Step 6: Final answer
    x = 2,334.76

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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.