Home / 1,221,892,063.68-1,686,215,414.88-664,981,786.56

Finding the Fourth Proportional to 1,221,892,063.68, 1,686,215,414.88 and 664,981,786.56

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Solution

The fourth proportional to 1,221,892,063.68, 1,686,215,414.88 and 664,981,786.56 is: 917,677,242.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,221,892,063.68 : 1,686,215,414.88 = 664,981,786.56 : x
  2. Step 2: Convert to fraction form
    1,221,892,063.68/1,686,215,414.88 = 664,981,786.56/x
  3. Step 3: Cross multiply
    1,221,892,063.68x = 1,686,215,414.88 × 664,981,786.56
  4. Step 4: Simplify right side
    1,221,892,063.68x = 1,121,302,539,111,913,984
  5. Step 5: Solve for x
    x = 1,121,302,539,111,913,984/1,221,892,063.68
  6. Step 6: Final answer
    x = 917,677,242.08

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.