Home / 3,138.53-4,707.80-1,288.35

Finding the Fourth Proportional to 3,138.53, 4,707.80 and 1,288.35

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Solution

The fourth proportional to 3,138.53, 4,707.80 and 1,288.35 is: 1,932.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.53 : 4,707.80 = 1,288.35 : x
  2. Step 2: Convert to fraction form
    3,138.53/4,707.80 = 1,288.35/x
  3. Step 3: Cross multiply
    3,138.53x = 4,707.80 × 1,288.35
  4. Step 4: Simplify right side
    3,138.53x = 6,065,287.69
  5. Step 5: Solve for x
    x = 6,065,287.69/3,138.53
  6. Step 6: Final answer
    x = 1,932.52

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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.