Home / 1,279,209,849.80-1,920,249,665.40-989,361,928.40

Finding the Fourth Proportional to 1,279,209,849.80, 1,920,249,665.40 and 989,361,928.40

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Solution

The fourth proportional to 1,279,209,849.80, 1,920,249,665.40 and 989,361,928.40 is: 1,485,152,660.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279,209,849.80 : 1,920,249,665.40 = 989,361,928.40 : x
  2. Step 2: Convert to fraction form
    1,279,209,849.80/1,920,249,665.40 = 989,361,928.40/x
  3. Step 3: Cross multiply
    1,279,209,849.80x = 1,920,249,665.40 × 989,361,928.40
  4. Step 4: Simplify right side
    1,279,209,849.80x = 1,899,821,911,969,598,720
  5. Step 5: Solve for x
    x = 1,899,821,911,969,598,720/1,279,209,849.80
  6. Step 6: Final answer
    x = 1,485,152,660.66

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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.