Home / 644,305,194.68-889,116,142.38-393,828,970.40

Finding the Fourth Proportional to 644,305,194.68, 889,116,142.38 and 393,828,970.40

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Solution

The fourth proportional to 644,305,194.68, 889,116,142.38 and 393,828,970.40 is: 543,468,681.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,305,194.68 : 889,116,142.38 = 393,828,970.40 : x
  2. Step 2: Convert to fraction form
    644,305,194.68/889,116,142.38 = 393,828,970.40/x
  3. Step 3: Cross multiply
    644,305,194.68x = 889,116,142.38 × 393,828,970.40
  4. Step 4: Simplify right side
    644,305,194.68x = 350,159,694,919,535,168
  5. Step 5: Solve for x
    x = 350,159,694,919,535,168/644,305,194.68
  6. Step 6: Final answer
    x = 543,468,681.94

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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.