Home / 1,320,775.40-1,981,163.10-689,542.40

Finding the Fourth Proportional to 1,320,775.40, 1,981,163.10 and 689,542.40

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Solution

The fourth proportional to 1,320,775.40, 1,981,163.10 and 689,542.40 is: 1,034,313.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320,775.40 : 1,981,163.10 = 689,542.40 : x
  2. Step 2: Convert to fraction form
    1,320,775.40/1,981,163.10 = 689,542.40/x
  3. Step 3: Cross multiply
    1,320,775.40x = 1,981,163.10 × 689,542.40
  4. Step 4: Simplify right side
    1,320,775.40x = 1,366,095,958,765.44
  5. Step 5: Solve for x
    x = 1,366,095,958,765.44/1,320,775.40
  6. Step 6: Final answer
    x = 1,034,313.60

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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.