Home / 3,431.64-4,735.76-1,919.32

Finding the Fourth Proportional to 3,431.64, 4,735.76 and 1,919.32

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Solution

The fourth proportional to 3,431.64, 4,735.76 and 1,919.32 is: 2,648.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,431.64 : 4,735.76 = 1,919.32 : x
  2. Step 2: Convert to fraction form
    3,431.64/4,735.76 = 1,919.32/x
  3. Step 3: Cross multiply
    3,431.64x = 4,735.76 × 1,919.32
  4. Step 4: Simplify right side
    3,431.64x = 9,089,438.88
  5. Step 5: Solve for x
    x = 9,089,438.88/3,431.64
  6. Step 6: Final answer
    x = 2,648.72

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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.