Home / 3,145.40-4,720.80-1,393.10

Finding the Fourth Proportional to 3,145.40, 4,720.80 and 1,393.10

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Solution

The fourth proportional to 3,145.40, 4,720.80 and 1,393.10 is: 2,090.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,145.40 : 4,720.80 = 1,393.10 : x
  2. Step 2: Convert to fraction form
    3,145.40/4,720.80 = 1,393.10/x
  3. Step 3: Cross multiply
    3,145.40x = 4,720.80 × 1,393.10
  4. Step 4: Simplify right side
    3,145.40x = 6,576,546.48
  5. Step 5: Solve for x
    x = 6,576,546.48/3,145.40
  6. Step 6: Final answer
    x = 2,090.85

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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.