Home / 3,918.40-5,402.64-2,868.64

Finding the Fourth Proportional to 3,918.40, 5,402.64 and 2,868.64

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Solution

The fourth proportional to 3,918.40, 5,402.64 and 2,868.64 is: 3,955.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,918.40 : 5,402.64 = 2,868.64 : x
  2. Step 2: Convert to fraction form
    3,918.40/5,402.64 = 2,868.64/x
  3. Step 3: Cross multiply
    3,918.40x = 5,402.64 × 2,868.64
  4. Step 4: Simplify right side
    3,918.40x = 15,498,229.21
  5. Step 5: Solve for x
    x = 15,498,229.21/3,918.40
  6. Step 6: Final answer
    x = 3,955.24

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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.