Home / 1,938.78-2,908.19-552.15

Finding the Fourth Proportional to 1,938.78, 2,908.19 and 552.15

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Solution

The fourth proportional to 1,938.78, 2,908.19 and 552.15 is: 828.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,938.78 : 2,908.19 = 552.15 : x
  2. Step 2: Convert to fraction form
    1,938.78/2,908.19 = 552.15/x
  3. Step 3: Cross multiply
    1,938.78x = 2,908.19 × 552.15
  4. Step 4: Simplify right side
    1,938.78x = 1,605,758.49
  5. Step 5: Solve for x
    x = 1,605,758.49/1,938.78
  6. Step 6: Final answer
    x = 828.23

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.