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Finding the Fourth Proportional to 863,999.55, 1,295,999.33 and 781,330.95

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Solution

The fourth proportional to 863,999.55, 1,295,999.33 and 781,330.95 is: 1,171,996.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    863,999.55 : 1,295,999.33 = 781,330.95 : x
  2. Step 2: Convert to fraction form
    863,999.55/1,295,999.33 = 781,330.95/x
  3. Step 3: Cross multiply
    863,999.55x = 1,295,999.33 × 781,330.95
  4. Step 4: Simplify right side
    863,999.55x = 1,012,604,383,801.61
  5. Step 5: Solve for x
    x = 1,012,604,383,801.61/863,999.55
  6. Step 6: Final answer
    x = 1,171,996.43

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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.