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Finding the Fourth Proportional to 2,136.36, 3,206.36 and 838.76

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Solution

The fourth proportional to 2,136.36, 3,206.36 and 838.76 is: 1,258.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,136.36 : 3,206.36 = 838.76 : x
  2. Step 2: Convert to fraction form
    2,136.36/3,206.36 = 838.76/x
  3. Step 3: Cross multiply
    2,136.36x = 3,206.36 × 838.76
  4. Step 4: Simplify right side
    2,136.36x = 2,689,366.51
  5. Step 5: Solve for x
    x = 2,689,366.51/2,136.36
  6. Step 6: Final answer
    x = 1,258.85

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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.