Home / 3,945.28-5,915.80-1,966.60

Finding the Fourth Proportional to 3,945.28, 5,915.80 and 1,966.60

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Solution

The fourth proportional to 3,945.28, 5,915.80 and 1,966.60 is: 2,948.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,945.28 : 5,915.80 = 1,966.60 : x
  2. Step 2: Convert to fraction form
    3,945.28/5,915.80 = 1,966.60/x
  3. Step 3: Cross multiply
    3,945.28x = 5,915.80 × 1,966.60
  4. Step 4: Simplify right side
    3,945.28x = 11,634,012.28
  5. Step 5: Solve for x
    x = 11,634,012.28/3,945.28
  6. Step 6: Final answer
    x = 2,948.84

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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.