Home / 3,131.30-4,697.01-1,399.58

Finding the Fourth Proportional to 3,131.30, 4,697.01 and 1,399.58

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Solution

The fourth proportional to 3,131.30, 4,697.01 and 1,399.58 is: 2,099.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,131.30 : 4,697.01 = 1,399.58 : x
  2. Step 2: Convert to fraction form
    3,131.30/4,697.01 = 1,399.58/x
  3. Step 3: Cross multiply
    3,131.30x = 4,697.01 × 1,399.58
  4. Step 4: Simplify right side
    3,131.30x = 6,573,841.26
  5. Step 5: Solve for x
    x = 6,573,841.26/3,131.30
  6. Step 6: Final answer
    x = 2,099.40

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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.