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Finding the Fourth Proportional to 2,939.41, 4,409.32 and 859.47

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Solution

The fourth proportional to 2,939.41, 4,409.32 and 859.47 is: 1,289.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,939.41 : 4,409.32 = 859.47 : x
  2. Step 2: Convert to fraction form
    2,939.41/4,409.32 = 859.47/x
  3. Step 3: Cross multiply
    2,939.41x = 4,409.32 × 859.47
  4. Step 4: Simplify right side
    2,939.41x = 3,789,678.26
  5. Step 5: Solve for x
    x = 3,789,678.26/2,939.41
  6. Step 6: Final answer
    x = 1,289.26

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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.