Home / 3,138.57-4,705.16-1,288.53

Finding the Fourth Proportional to 3,138.57, 4,705.16 and 1,288.53

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Solution

The fourth proportional to 3,138.57, 4,705.16 and 1,288.53 is: 1,931.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.57 : 4,705.16 = 1,288.53 : x
  2. Step 2: Convert to fraction form
    3,138.57/4,705.16 = 1,288.53/x
  3. Step 3: Cross multiply
    3,138.57x = 4,705.16 × 1,288.53
  4. Step 4: Simplify right side
    3,138.57x = 6,062,733.37
  5. Step 5: Solve for x
    x = 6,062,733.37/3,138.57
  6. Step 6: Final answer
    x = 1,931.69

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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.