Home / 3,945.80-5,918.70-3,312.20

Finding the Fourth Proportional to 3,945.80, 5,918.70 and 3,312.20

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Solution

The fourth proportional to 3,945.80, 5,918.70 and 3,312.20 is: 4,968.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,945.80 : 5,918.70 = 3,312.20 : x
  2. Step 2: Convert to fraction form
    3,945.80/5,918.70 = 3,312.20/x
  3. Step 3: Cross multiply
    3,945.80x = 5,918.70 × 3,312.20
  4. Step 4: Simplify right side
    3,945.80x = 19,603,918.14
  5. Step 5: Solve for x
    x = 19,603,918.14/3,945.80
  6. Step 6: Final answer
    x = 4,968.30

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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.