Home / 2,991.85-4,128.06-1,812.67

Finding the Fourth Proportional to 2,991.85, 4,128.06 and 1,812.67

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Solution

The fourth proportional to 2,991.85, 4,128.06 and 1,812.67 is: 2,501.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,991.85 : 4,128.06 = 1,812.67 : x
  2. Step 2: Convert to fraction form
    2,991.85/4,128.06 = 1,812.67/x
  3. Step 3: Cross multiply
    2,991.85x = 4,128.06 × 1,812.67
  4. Step 4: Simplify right side
    2,991.85x = 7,482,810.52
  5. Step 5: Solve for x
    x = 7,482,810.52/2,991.85
  6. Step 6: Final answer
    x = 2,501.06

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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.