Home / 388,470,876.72-582,706,310.76-215,865,138.48

Finding the Fourth Proportional to 388,470,876.72, 582,706,310.76 and 215,865,138.48

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Solution

The fourth proportional to 388,470,876.72, 582,706,310.76 and 215,865,138.48 is: 323,797,705.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,470,876.72 : 582,706,310.76 = 215,865,138.48 : x
  2. Step 2: Convert to fraction form
    388,470,876.72/582,706,310.76 = 215,865,138.48/x
  3. Step 3: Cross multiply
    388,470,876.72x = 582,706,310.76 × 215,865,138.48
  4. Step 4: Simplify right side
    388,470,876.72x = 125,785,978,465,377,312
  5. Step 5: Solve for x
    x = 125,785,978,465,377,312/388,470,876.72
  6. Step 6: Final answer
    x = 323,797,705.32

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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.