Home / 279,936,280.80-419,904,421.20-211,911,832.80

Finding the Fourth Proportional to 279,936,280.80, 419,904,421.20 and 211,911,832.80

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Solution

The fourth proportional to 279,936,280.80, 419,904,421.20 and 211,911,832.80 is: 317,867,749.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,936,280.80 : 419,904,421.20 = 211,911,832.80 : x
  2. Step 2: Convert to fraction form
    279,936,280.80/419,904,421.20 = 211,911,832.80/x
  3. Step 3: Cross multiply
    279,936,280.80x = 419,904,421.20 × 211,911,832.80
  4. Step 4: Simplify right side
    279,936,280.80x = 88,982,715,497,315,184
  5. Step 5: Solve for x
    x = 88,982,715,497,315,184/279,936,280.80
  6. Step 6: Final answer
    x = 317,867,749.20

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1.5x scale

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.