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Finding the Fourth Proportional to 2,109.63, 3,164.35 and 723.09

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Solution

The fourth proportional to 2,109.63, 3,164.35 and 723.09 is: 1,084.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,109.63 : 3,164.35 = 723.09 : x
  2. Step 2: Convert to fraction form
    2,109.63/3,164.35 = 723.09/x
  3. Step 3: Cross multiply
    2,109.63x = 3,164.35 × 723.09
  4. Step 4: Simplify right side
    2,109.63x = 2,288,109.84
  5. Step 5: Solve for x
    x = 2,288,109.84/2,109.63
  6. Step 6: Final answer
    x = 1,084.60

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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.