Home / 3,090.51-4,638.60-1,242.90

Finding the Fourth Proportional to 3,090.51, 4,638.60 and 1,242.90

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Solution

The fourth proportional to 3,090.51, 4,638.60 and 1,242.90 is: 1,865.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,090.51 : 4,638.60 = 1,242.90 : x
  2. Step 2: Convert to fraction form
    3,090.51/4,638.60 = 1,242.90/x
  3. Step 3: Cross multiply
    3,090.51x = 4,638.60 × 1,242.90
  4. Step 4: Simplify right side
    3,090.51x = 5,765,315.94
  5. Step 5: Solve for x
    x = 5,765,315.94/3,090.51
  6. Step 6: Final answer
    x = 1,865.49

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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.