Home / 3,138.48-4,705.02-1,288.44

Finding the Fourth Proportional to 3,138.48, 4,705.02 and 1,288.44

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Solution

The fourth proportional to 3,138.48, 4,705.02 and 1,288.44 is: 1,931.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.48 : 4,705.02 = 1,288.44 : x
  2. Step 2: Convert to fraction form
    3,138.48/4,705.02 = 1,288.44/x
  3. Step 3: Cross multiply
    3,138.48x = 4,705.02 × 1,288.44
  4. Step 4: Simplify right side
    3,138.48x = 6,062,135.97
  5. Step 5: Solve for x
    x = 6,062,135.97/3,138.48
  6. Step 6: Final answer
    x = 1,931.55

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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.