Home / 1,279,209,847.80-1,920,249,662.40-989,361,926.40

Finding the Fourth Proportional to 1,279,209,847.80, 1,920,249,662.40 and 989,361,926.40

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Solution

The fourth proportional to 1,279,209,847.80, 1,920,249,662.40 and 989,361,926.40 is: 1,485,152,657.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,279,209,847.80 : 1,920,249,662.40 = 989,361,926.40 : x
  2. Step 2: Convert to fraction form
    1,279,209,847.80/1,920,249,662.40 = 989,361,926.40/x
  3. Step 3: Cross multiply
    1,279,209,847.80x = 1,920,249,662.40 × 989,361,926.40
  4. Step 4: Simplify right side
    1,279,209,847.80x = 1,899,821,905,161,013,760
  5. Step 5: Solve for x
    x = 1,899,821,905,161,013,760/1,279,209,847.80
  6. Step 6: Final answer
    x = 1,485,152,657.66

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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.