Home / 2,489.45-3,435.48-1,427.21

Finding the Fourth Proportional to 2,489.45, 3,435.48 and 1,427.21

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Solution

The fourth proportional to 2,489.45, 3,435.48 and 1,427.21 is: 1,969.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,489.45 : 3,435.48 = 1,427.21 : x
  2. Step 2: Convert to fraction form
    2,489.45/3,435.48 = 1,427.21/x
  3. Step 3: Cross multiply
    2,489.45x = 3,435.48 × 1,427.21
  4. Step 4: Simplify right side
    2,489.45x = 4,903,151.41
  5. Step 5: Solve for x
    x = 4,903,151.41/2,489.45
  6. Step 6: Final answer
    x = 1,969.57

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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.