Home / 3,147.32-4,720.34-2,991.20

Finding the Fourth Proportional to 3,147.32, 4,720.34 and 2,991.20

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Solution

The fourth proportional to 3,147.32, 4,720.34 and 2,991.20 is: 4,486.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,147.32 : 4,720.34 = 2,991.20 : x
  2. Step 2: Convert to fraction form
    3,147.32/4,720.34 = 2,991.20/x
  3. Step 3: Cross multiply
    3,147.32x = 4,720.34 × 2,991.20
  4. Step 4: Simplify right side
    3,147.32x = 14,119,481.01
  5. Step 5: Solve for x
    x = 14,119,481.01/3,147.32
  6. Step 6: Final answer
    x = 4,486.19

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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.