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Finding the Fourth Proportional to 818,999.66, 1,228,597.90 and 774,209.90

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Solution

The fourth proportional to 818,999.66, 1,228,597.90 and 774,209.90 is: 1,161,407.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    818,999.66 : 1,228,597.90 = 774,209.90 : x
  2. Step 2: Convert to fraction form
    818,999.66/1,228,597.90 = 774,209.90/x
  3. Step 3: Cross multiply
    818,999.66x = 1,228,597.90 × 774,209.90
  4. Step 4: Simplify right side
    818,999.66x = 951,192,649,220.70
  5. Step 5: Solve for x
    x = 951,192,649,220.70/818,999.66
  6. Step 6: Final answer
    x = 1,161,407.88

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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.