Home / 645,040,857.17-890,130,743.64-380,807,967.33

Finding the Fourth Proportional to 645,040,857.17, 890,130,743.64 and 380,807,967.33

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Solution

The fourth proportional to 645,040,857.17, 890,130,743.64 and 380,807,967.33 is: 525,499,858.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,040,857.17 : 890,130,743.64 = 380,807,967.33 : x
  2. Step 2: Convert to fraction form
    645,040,857.17/890,130,743.64 = 380,807,967.33/x
  3. Step 3: Cross multiply
    645,040,857.17x = 890,130,743.64 × 380,807,967.33
  4. Step 4: Simplify right side
    645,040,857.17x = 338,968,879,143,489,728
  5. Step 5: Solve for x
    x = 338,968,879,143,489,728/645,040,857.17
  6. Step 6: Final answer
    x = 525,499,858.46

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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.