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Finding the Fourth Proportional to 3,978,244.80, 5,489,786.88 and 2,259,138.24

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Solution

The fourth proportional to 3,978,244.80, 5,489,786.88 and 2,259,138.24 is: 3,117,502.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,978,244.80 : 5,489,786.88 = 2,259,138.24 : x
  2. Step 2: Convert to fraction form
    3,978,244.80/5,489,786.88 = 2,259,138.24/x
  3. Step 3: Cross multiply
    3,978,244.80x = 5,489,786.88 × 2,259,138.24
  4. Step 4: Simplify right side
    3,978,244.80x = 12,402,187,470,058.29
  5. Step 5: Solve for x
    x = 12,402,187,470,058.29/3,978,244.80
  6. Step 6: Final answer
    x = 3,117,502.34

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1.5x scale

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.