Home / 1,938.74-2,902.98-1,321.52

Finding the Fourth Proportional to 1,938.74, 2,902.98 and 1,321.52

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Solution

The fourth proportional to 1,938.74, 2,902.98 and 1,321.52 is: 1,978.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,938.74 : 2,902.98 = 1,321.52 : x
  2. Step 2: Convert to fraction form
    1,938.74/2,902.98 = 1,321.52/x
  3. Step 3: Cross multiply
    1,938.74x = 2,902.98 × 1,321.52
  4. Step 4: Simplify right side
    1,938.74x = 3,836,346.13
  5. Step 5: Solve for x
    x = 3,836,346.13/1,938.74
  6. Step 6: Final answer
    x = 1,978.78

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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.