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Finding the Fourth Proportional to 1,944,662.40, 2,915,956.80 and 821,462.40

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Solution

The fourth proportional to 1,944,662.40, 2,915,956.80 and 821,462.40 is: 1,231,755.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,944,662.40 : 2,915,956.80 = 821,462.40 : x
  2. Step 2: Convert to fraction form
    1,944,662.40/2,915,956.80 = 821,462.40/x
  3. Step 3: Cross multiply
    1,944,662.40x = 2,915,956.80 × 821,462.40
  4. Step 4: Simplify right side
    1,944,662.40x = 2,395,348,871,224.32
  5. Step 5: Solve for x
    x = 2,395,348,871,224.32/1,944,662.40
  6. Step 6: Final answer
    x = 1,231,755.64

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.