Home / 2,971.40-4,100.56-1,645.12

Finding the Fourth Proportional to 2,971.40, 4,100.56 and 1,645.12

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Solution

The fourth proportional to 2,971.40, 4,100.56 and 1,645.12 is: 2,270.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,971.40 : 4,100.56 = 1,645.12 : x
  2. Step 2: Convert to fraction form
    2,971.40/4,100.56 = 1,645.12/x
  3. Step 3: Cross multiply
    2,971.40x = 4,100.56 × 1,645.12
  4. Step 4: Simplify right side
    2,971.40x = 6,745,919.41
  5. Step 5: Solve for x
    x = 6,745,919.41/2,971.40
  6. Step 6: Final answer
    x = 2,270.29

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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.