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Finding the Fourth Proportional to 3,842.91, 5,303.26 and 2,164.32

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Solution

The fourth proportional to 3,842.91, 5,303.26 and 2,164.32 is: 2,986.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,842.91 : 5,303.26 = 2,164.32 : x
  2. Step 2: Convert to fraction form
    3,842.91/5,303.26 = 2,164.32/x
  3. Step 3: Cross multiply
    3,842.91x = 5,303.26 × 2,164.32
  4. Step 4: Simplify right side
    3,842.91x = 11,477,951.68
  5. Step 5: Solve for x
    x = 11,477,951.68/3,842.91
  6. Step 6: Final answer
    x = 2,986.79

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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.