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Finding the Fourth Proportional to 479,410.80, 661,619.25 and 275,528.40

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Solution

The fourth proportional to 479,410.80, 661,619.25 and 275,528.40 is: 380,247.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,410.80 : 661,619.25 = 275,528.40 : x
  2. Step 2: Convert to fraction form
    479,410.80/661,619.25 = 275,528.40/x
  3. Step 3: Cross multiply
    479,410.80x = 661,619.25 × 275,528.40
  4. Step 4: Simplify right side
    479,410.80x = 182,294,893,361.70
  5. Step 5: Solve for x
    x = 182,294,893,361.70/479,410.80
  6. Step 6: Final answer
    x = 380,247.78

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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.