Home / 3,118.06-4,302.81-1,720.78

Finding the Fourth Proportional to 3,118.06, 4,302.81 and 1,720.78

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Solution

The fourth proportional to 3,118.06, 4,302.81 and 1,720.78 is: 2,374.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,118.06 : 4,302.81 = 1,720.78 : x
  2. Step 2: Convert to fraction form
    3,118.06/4,302.81 = 1,720.78/x
  3. Step 3: Cross multiply
    3,118.06x = 4,302.81 × 1,720.78
  4. Step 4: Simplify right side
    3,118.06x = 7,404,189.39
  5. Step 5: Solve for x
    x = 7,404,189.39/3,118.06
  6. Step 6: Final answer
    x = 2,374.61

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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.