Home / 3,119.10-4,303.98-1,721.76

Finding the Fourth Proportional to 3,119.10, 4,303.98 and 1,721.76

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Solution

The fourth proportional to 3,119.10, 4,303.98 and 1,721.76 is: 2,375.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,119.10 : 4,303.98 = 1,721.76 : x
  2. Step 2: Convert to fraction form
    3,119.10/4,303.98 = 1,721.76/x
  3. Step 3: Cross multiply
    3,119.10x = 4,303.98 × 1,721.76
  4. Step 4: Simplify right side
    3,119.10x = 7,410,420.60
  5. Step 5: Solve for x
    x = 7,410,420.60/3,119.10
  6. Step 6: Final answer
    x = 2,375.82

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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.