Home / 280,727,998.80-421,091,998.20-212,703,550.80

Finding the Fourth Proportional to 280,727,998.80, 421,091,998.20 and 212,703,550.80

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Solution

The fourth proportional to 280,727,998.80, 421,091,998.20 and 212,703,550.80 is: 319,055,326.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,727,998.80 : 421,091,998.20 = 212,703,550.80 : x
  2. Step 2: Convert to fraction form
    280,727,998.80/421,091,998.20 = 212,703,550.80/x
  3. Step 3: Cross multiply
    280,727,998.80x = 421,091,998.20 × 212,703,550.80
  4. Step 4: Simplify right side
    280,727,998.80x = 89,567,763,230,607,216
  5. Step 5: Solve for x
    x = 89,567,763,230,607,216/280,727,998.80
  6. Step 6: Final answer
    x = 319,055,326.20

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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.