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Finding the Fourth Proportional to 548,078.70, 821,340.45 and 404,805.90

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Solution

The fourth proportional to 548,078.70, 821,340.45 and 404,805.90 is: 606,634.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    548,078.70 : 821,340.45 = 404,805.90 : x
  2. Step 2: Convert to fraction form
    548,078.70/821,340.45 = 404,805.90/x
  3. Step 3: Cross multiply
    548,078.70x = 821,340.45 × 404,805.90
  4. Step 4: Simplify right side
    548,078.70x = 332,483,460,068.66
  5. Step 5: Solve for x
    x = 332,483,460,068.66/548,078.70
  6. Step 6: Final answer
    x = 606,634.52

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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.