Home / 3,918.70-5,407.46-2,239.77

Finding the Fourth Proportional to 3,918.70, 5,407.46 and 2,239.77

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Solution

The fourth proportional to 3,918.70, 5,407.46 and 2,239.77 is: 3,090.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,918.70 : 5,407.46 = 2,239.77 : x
  2. Step 2: Convert to fraction form
    3,918.70/5,407.46 = 2,239.77/x
  3. Step 3: Cross multiply
    3,918.70x = 5,407.46 × 2,239.77
  4. Step 4: Simplify right side
    3,918.70x = 12,111,466.68
  5. Step 5: Solve for x
    x = 12,111,466.68/3,918.70
  6. Step 6: Final answer
    x = 3,090.68

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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.