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Finding the Fourth Proportional to 3,889.63, 5,834.42 and 1,116.31

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Solution

The fourth proportional to 3,889.63, 5,834.42 and 1,116.31 is: 1,674.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,889.63 : 5,834.42 = 1,116.31 : x
  2. Step 2: Convert to fraction form
    3,889.63/5,834.42 = 1,116.31/x
  3. Step 3: Cross multiply
    3,889.63x = 5,834.42 × 1,116.31
  4. Step 4: Simplify right side
    3,889.63x = 6,513,021.39
  5. Step 5: Solve for x
    x = 6,513,021.39/3,889.63
  6. Step 6: Final answer
    x = 1,674.46

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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.