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Finding the Fourth Proportional to 6,463,978.77, 8,918,637.51 and 4,108,317.33

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Solution

The fourth proportional to 6,463,978.77, 8,918,637.51 and 4,108,317.33 is: 5,668,427.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,463,978.77 : 8,918,637.51 = 4,108,317.33 : x
  2. Step 2: Convert to fraction form
    6,463,978.77/8,918,637.51 = 4,108,317.33/x
  3. Step 3: Cross multiply
    6,463,978.77x = 8,918,637.51 × 4,108,317.33
  4. Step 4: Simplify right side
    6,463,978.77x = 36,640,593,042,321.05
  5. Step 5: Solve for x
    x = 36,640,593,042,321.05/6,463,978.77
  6. Step 6: Final answer
    x = 5,668,427.19

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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.