Home / 1,981,421.80-2,972,132.70-1,272,833.80

Finding the Fourth Proportional to 1,981,421.80, 2,972,132.70 and 1,272,833.80

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Solution

The fourth proportional to 1,981,421.80, 2,972,132.70 and 1,272,833.80 is: 1,909,250.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,981,421.80 : 2,972,132.70 = 1,272,833.80 : x
  2. Step 2: Convert to fraction form
    1,981,421.80/2,972,132.70 = 1,272,833.80/x
  3. Step 3: Cross multiply
    1,981,421.80x = 2,972,132.70 × 1,272,833.80
  4. Step 4: Simplify right side
    1,981,421.80x = 3,783,030,958,645.26
  5. Step 5: Solve for x
    x = 3,783,030,958,645.26/1,981,421.80
  6. Step 6: Final answer
    x = 1,909,250.70

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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.