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Finding the Fourth Proportional to 863,289.20, 1,294,820.40 and 264,310.40

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Solution

The fourth proportional to 863,289.20, 1,294,820.40 and 264,310.40 is: 396,430.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    863,289.20 : 1,294,820.40 = 264,310.40 : x
  2. Step 2: Convert to fraction form
    863,289.20/1,294,820.40 = 264,310.40/x
  3. Step 3: Cross multiply
    863,289.20x = 1,294,820.40 × 264,310.40
  4. Step 4: Simplify right side
    863,289.20x = 342,234,497,852.16
  5. Step 5: Solve for x
    x = 342,234,497,852.16/863,289.20
  6. Step 6: Final answer
    x = 396,430.88

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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.