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Finding the Fourth Proportional to 465,843.40, 698,765.10 and 408,106.60

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Solution

The fourth proportional to 465,843.40, 698,765.10 and 408,106.60 is: 612,159.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    465,843.40 : 698,765.10 = 408,106.60 : x
  2. Step 2: Convert to fraction form
    465,843.40/698,765.10 = 408,106.60/x
  3. Step 3: Cross multiply
    465,843.40x = 698,765.10 × 408,106.60
  4. Step 4: Simplify right side
    465,843.40x = 285,170,649,159.66
  5. Step 5: Solve for x
    x = 285,170,649,159.66/465,843.40
  6. Step 6: Final answer
    x = 612,159.90

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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.