Home / 1,320,749.80-1,981,124.70-1,312,876.60

Finding the Fourth Proportional to 1,320,749.80, 1,981,124.70 and 1,312,876.60

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Solution

The fourth proportional to 1,320,749.80, 1,981,124.70 and 1,312,876.60 is: 1,969,314.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320,749.80 : 1,981,124.70 = 1,312,876.60 : x
  2. Step 2: Convert to fraction form
    1,320,749.80/1,981,124.70 = 1,312,876.60/x
  3. Step 3: Cross multiply
    1,320,749.80x = 1,981,124.70 × 1,312,876.60
  4. Step 4: Simplify right side
    1,320,749.80x = 2,600,972,260,312.02
  5. Step 5: Solve for x
    x = 2,600,972,260,312.02/1,320,749.80
  6. Step 6: Final answer
    x = 1,969,314.90

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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.