Home / 1,938.60-2,908.44-1,116.72

Finding the Fourth Proportional to 1,938.60, 2,908.44 and 1,116.72

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Solution

The fourth proportional to 1,938.60, 2,908.44 and 1,116.72 is: 1,675.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,938.60 : 2,908.44 = 1,116.72 : x
  2. Step 2: Convert to fraction form
    1,938.60/2,908.44 = 1,116.72/x
  3. Step 3: Cross multiply
    1,938.60x = 2,908.44 × 1,116.72
  4. Step 4: Simplify right side
    1,938.60x = 3,247,913.12
  5. Step 5: Solve for x
    x = 3,247,913.12/1,938.60
  6. Step 6: Final answer
    x = 1,675.39

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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.