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Finding the Fourth Proportional to 548,051.20, 821,299.20 and 404,778.40

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Solution

The fourth proportional to 548,051.20, 821,299.20 and 404,778.40 is: 606,593.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    548,051.20 : 821,299.20 = 404,778.40 : x
  2. Step 2: Convert to fraction form
    548,051.20/821,299.20 = 404,778.40/x
  3. Step 3: Cross multiply
    548,051.20x = 821,299.20 × 404,778.40
  4. Step 4: Simplify right side
    548,051.20x = 332,444,176,097.28
  5. Step 5: Solve for x
    x = 332,444,176,097.28/548,051.20
  6. Step 6: Final answer
    x = 606,593.28

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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.