Home / 1,938.70-2,675.36-1,099.40

Finding the Fourth Proportional to 1,938.70, 2,675.36 and 1,099.40

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Solution

The fourth proportional to 1,938.70, 2,675.36 and 1,099.40 is: 1,517.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,938.70 : 2,675.36 = 1,099.40 : x
  2. Step 2: Convert to fraction form
    1,938.70/2,675.36 = 1,099.40/x
  3. Step 3: Cross multiply
    1,938.70x = 2,675.36 × 1,099.40
  4. Step 4: Simplify right side
    1,938.70x = 2,941,300.22
  5. Step 5: Solve for x
    x = 2,941,300.22/1,938.70
  6. Step 6: Final answer
    x = 1,517.15

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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.