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Finding the Fourth Proportional to 2,137.94, 3,206.91 and 983.70

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Solution

The fourth proportional to 2,137.94, 3,206.91 and 983.70 is: 1,475.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,137.94 : 3,206.91 = 983.70 : x
  2. Step 2: Convert to fraction form
    2,137.94/3,206.91 = 983.70/x
  3. Step 3: Cross multiply
    2,137.94x = 3,206.91 × 983.70
  4. Step 4: Simplify right side
    2,137.94x = 3,154,637.37
  5. Step 5: Solve for x
    x = 3,154,637.37/2,137.94
  6. Step 6: Final answer
    x = 1,475.55

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Similar ratio
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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.