Home / 3,118.70-4,303.80-1,721.45

Finding the Fourth Proportional to 3,118.70, 4,303.80 and 1,721.45

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Solution

The fourth proportional to 3,118.70, 4,303.80 and 1,721.45 is: 2,375.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,118.70 : 4,303.80 = 1,721.45 : x
  2. Step 2: Convert to fraction form
    3,118.70/4,303.80 = 1,721.45/x
  3. Step 3: Cross multiply
    3,118.70x = 4,303.80 × 1,721.45
  4. Step 4: Simplify right side
    3,118.70x = 7,408,754.99
  5. Step 5: Solve for x
    x = 7,408,754.99/3,118.70
  6. Step 6: Final answer
    x = 2,375.59

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.