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Finding the Fourth Proportional to 548,061.20, 821,314.20 and 404,788.40

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Solution

The fourth proportional to 548,061.20, 821,314.20 and 404,788.40 is: 606,608.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    548,061.20 : 821,314.20 = 404,788.40 : x
  2. Step 2: Convert to fraction form
    548,061.20/821,314.20 = 404,788.40/x
  3. Step 3: Cross multiply
    548,061.20x = 821,314.20 × 404,788.40
  4. Step 4: Simplify right side
    548,061.20x = 332,458,460,915.28
  5. Step 5: Solve for x
    x = 332,458,460,915.28/548,061.20
  6. Step 6: Final answer
    x = 606,608.28

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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.