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Finding the Fourth Proportional to 408,076.90, 612,115.35 and 404,140.30

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Solution

The fourth proportional to 408,076.90, 612,115.35 and 404,140.30 is: 606,210.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    408,076.90 : 612,115.35 = 404,140.30 : x
  2. Step 2: Convert to fraction form
    408,076.90/612,115.35 = 404,140.30/x
  3. Step 3: Cross multiply
    408,076.90x = 612,115.35 × 404,140.30
  4. Step 4: Simplify right side
    408,076.90x = 247,380,481,183.61
  5. Step 5: Solve for x
    x = 247,380,481,183.61/408,076.90
  6. Step 6: Final answer
    x = 606,210.45

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1.5x scale

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.