Home / 3,945.21-5,915.98-1,478.26

Finding the Fourth Proportional to 3,945.21, 5,915.98 and 1,478.26

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Solution

The fourth proportional to 3,945.21, 5,915.98 and 1,478.26 is: 2,216.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,945.21 : 5,915.98 = 1,478.26 : x
  2. Step 2: Convert to fraction form
    3,945.21/5,915.98 = 1,478.26/x
  3. Step 3: Cross multiply
    3,945.21x = 5,915.98 × 1,478.26
  4. Step 4: Simplify right side
    3,945.21x = 8,745,356.59
  5. Step 5: Solve for x
    x = 8,745,356.59/3,945.21
  6. Step 6: Final answer
    x = 2,216.70

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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.