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Finding the Fourth Proportional to 863,611.20, 1,295,416.80 and 800,625.60

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Solution

The fourth proportional to 863,611.20, 1,295,416.80 and 800,625.60 is: 1,200,938.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    863,611.20 : 1,295,416.80 = 800,625.60 : x
  2. Step 2: Convert to fraction form
    863,611.20/1,295,416.80 = 800,625.60/x
  3. Step 3: Cross multiply
    863,611.20x = 1,295,416.80 × 800,625.60
  4. Step 4: Simplify right side
    863,611.20x = 1,037,143,852,750.08
  5. Step 5: Solve for x
    x = 1,037,143,852,750.08/863,611.20
  6. Step 6: Final answer
    x = 1,200,938.40

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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.