Home / 1,280,742.44-1,921,445.48-681,210.12

Finding the Fourth Proportional to 1,280,742.44, 1,921,445.48 and 681,210.12

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Solution

The fourth proportional to 1,280,742.44, 1,921,445.48 and 681,210.12 is: 1,021,991.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,280,742.44 : 1,921,445.48 = 681,210.12 : x
  2. Step 2: Convert to fraction form
    1,280,742.44/1,921,445.48 = 681,210.12/x
  3. Step 3: Cross multiply
    1,280,742.44x = 1,921,445.48 × 681,210.12
  4. Step 4: Simplify right side
    1,280,742.44x = 1,308,908,106,004.26
  5. Step 5: Solve for x
    x = 1,308,908,106,004.26/1,280,742.44
  6. Step 6: Final answer
    x = 1,021,991.67

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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.