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Finding the Fourth Proportional to 1,254,999.78, 1,731,913.20 and 682,040.08

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Solution

The fourth proportional to 1,254,999.78, 1,731,913.20 and 682,040.08 is: 941,222.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,254,999.78 : 1,731,913.20 = 682,040.08 : x
  2. Step 2: Convert to fraction form
    1,254,999.78/1,731,913.20 = 682,040.08/x
  3. Step 3: Cross multiply
    1,254,999.78x = 1,731,913.20 × 682,040.08
  4. Step 4: Simplify right side
    1,254,999.78x = 1,181,234,217,481.06
  5. Step 5: Solve for x
    x = 1,181,234,217,481.06/1,254,999.78
  6. Step 6: Final answer
    x = 941,222.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.