Home / 644,308,054.62-889,120,086-393,831,829.08

Finding the Fourth Proportional to 644,308,054.62, 889,120,086 and 393,831,829.08

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Solution

The fourth proportional to 644,308,054.62, 889,120,086 and 393,831,829.08 is: 543,472,624.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,308,054.62 : 889,120,086 = 393,831,829.08 : x
  2. Step 2: Convert to fraction form
    644,308,054.62/889,120,086 = 393,831,829.08/x
  3. Step 3: Cross multiply
    644,308,054.62x = 889,120,086 × 393,831,829.08
  4. Step 4: Simplify right side
    644,308,054.62x = 350,163,789,741,146,880
  5. Step 5: Solve for x
    x = 350,163,789,741,146,880/644,308,054.62
  6. Step 6: Final answer
    x = 543,472,624.98

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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.