Home / 1,938.14-2,675.82-1,440.20

Finding the Fourth Proportional to 1,938.14, 2,675.82 and 1,440.20

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Solution

The fourth proportional to 1,938.14, 2,675.82 and 1,440.20 is: 1,988.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,938.14 : 2,675.82 = 1,440.20 : x
  2. Step 2: Convert to fraction form
    1,938.14/2,675.82 = 1,440.20/x
  3. Step 3: Cross multiply
    1,938.14x = 2,675.82 × 1,440.20
  4. Step 4: Simplify right side
    1,938.14x = 3,853,715.96
  5. Step 5: Solve for x
    x = 3,853,715.96/1,938.14
  6. Step 6: Final answer
    x = 1,988.36

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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.