Home / 3,918.80-5,407.08-3,291.68

Finding the Fourth Proportional to 3,918.80, 5,407.08 and 3,291.68

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Solution

The fourth proportional to 3,918.80, 5,407.08 and 3,291.68 is: 4,541.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,918.80 : 5,407.08 = 3,291.68 : x
  2. Step 2: Convert to fraction form
    3,918.80/5,407.08 = 3,291.68/x
  3. Step 3: Cross multiply
    3,918.80x = 5,407.08 × 3,291.68
  4. Step 4: Simplify right side
    3,918.80x = 17,798,377.09
  5. Step 5: Solve for x
    x = 17,798,377.09/3,918.80
  6. Step 6: Final answer
    x = 4,541.79

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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.