Home / 1,981,534,687.20-2,972,302,030.80-1,328,499,986.40

Finding the Fourth Proportional to 1,981,534,687.20, 2,972,302,030.80 and 1,328,499,986.40

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Solution

The fourth proportional to 1,981,534,687.20, 2,972,302,030.80 and 1,328,499,986.40 is: 1,992,749,979.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,981,534,687.20 : 2,972,302,030.80 = 1,328,499,986.40 : x
  2. Step 2: Convert to fraction form
    1,981,534,687.20/2,972,302,030.80 = 1,328,499,986.40/x
  3. Step 3: Cross multiply
    1,981,534,687.20x = 2,972,302,030.80 × 1,328,499,986.40
  4. Step 4: Simplify right side
    1,981,534,687.20x = 3,948,703,207,494,492,672
  5. Step 5: Solve for x
    x = 3,948,703,207,494,492,672/1,981,534,687.20
  6. Step 6: Final answer
    x = 1,992,749,979.60

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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.