Home / 1,315,916.40-1,971,736.20-1,189,945.20

Finding the Fourth Proportional to 1,315,916.40, 1,971,736.20 and 1,189,945.20

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Solution

The fourth proportional to 1,315,916.40, 1,971,736.20 and 1,189,945.20 is: 1,782,984.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315,916.40 : 1,971,736.20 = 1,189,945.20 : x
  2. Step 2: Convert to fraction form
    1,315,916.40/1,971,736.20 = 1,189,945.20/x
  3. Step 3: Cross multiply
    1,315,916.40x = 1,971,736.20 × 1,189,945.20
  4. Step 4: Simplify right side
    1,315,916.40x = 2,346,258,026,856.24
  5. Step 5: Solve for x
    x = 2,346,258,026,856.24/1,315,916.40
  6. Step 6: Final answer
    x = 1,782,984.11

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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.