Home / 3,918.64-5,407.48-2,240.16

Finding the Fourth Proportional to 3,918.64, 5,407.48 and 2,240.16

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Solution

The fourth proportional to 3,918.64, 5,407.48 and 2,240.16 is: 3,091.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,918.64 : 5,407.48 = 2,240.16 : x
  2. Step 2: Convert to fraction form
    3,918.64/5,407.48 = 2,240.16/x
  3. Step 3: Cross multiply
    3,918.64x = 5,407.48 × 2,240.16
  4. Step 4: Simplify right side
    3,918.64x = 12,113,620.40
  5. Step 5: Solve for x
    x = 12,113,620.40/3,918.64
  6. Step 6: Final answer
    x = 3,091.28

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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.