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Finding the Fourth Proportional to 3,196.80, 4,406.40 and 2,606.40

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Solution

The fourth proportional to 3,196.80, 4,406.40 and 2,606.40 is: 3,592.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,196.80 : 4,406.40 = 2,606.40 : x
  2. Step 2: Convert to fraction form
    3,196.80/4,406.40 = 2,606.40/x
  3. Step 3: Cross multiply
    3,196.80x = 4,406.40 × 2,606.40
  4. Step 4: Simplify right side
    3,196.80x = 11,484,840.96
  5. Step 5: Solve for x
    x = 11,484,840.96/3,196.80
  6. Step 6: Final answer
    x = 3,592.61

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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.