Home / 646,081,390.40-969,122,085.60-388,092,372.80

Finding the Fourth Proportional to 646,081,390.40, 969,122,085.60 and 388,092,372.80

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Solution

The fourth proportional to 646,081,390.40, 969,122,085.60 and 388,092,372.80 is: 582,138,559.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,081,390.40 : 969,122,085.60 = 388,092,372.80 : x
  2. Step 2: Convert to fraction form
    646,081,390.40/969,122,085.60 = 388,092,372.80/x
  3. Step 3: Cross multiply
    646,081,390.40x = 969,122,085.60 × 388,092,372.80
  4. Step 4: Simplify right side
    646,081,390.40x = 376,108,889,733,388,736
  5. Step 5: Solve for x
    x = 376,108,889,733,388,736/646,081,390.40
  6. Step 6: Final answer
    x = 582,138,559.20

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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.