Home / 728,584,651.62-1,005,448,141.92-398,559,790.62

Finding the Fourth Proportional to 728,584,651.62, 1,005,448,141.92 and 398,559,790.62

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Solution

The fourth proportional to 728,584,651.62, 1,005,448,141.92 and 398,559,790.62 is: 550,013,234.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,584,651.62 : 1,005,448,141.92 = 398,559,790.62 : x
  2. Step 2: Convert to fraction form
    728,584,651.62/1,005,448,141.92 = 398,559,790.62/x
  3. Step 3: Cross multiply
    728,584,651.62x = 1,005,448,141.92 × 398,559,790.62
  4. Step 4: Simplify right side
    728,584,651.62x = 400,731,200,922,903,232
  5. Step 5: Solve for x
    x = 400,731,200,922,903,232/728,584,651.62
  6. Step 6: Final answer
    x = 550,013,234.61

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1.5x scale

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.