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Finding the Fourth Proportional to 422,428.89, 634,971.94 and 366,959.76

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Solution

The fourth proportional to 422,428.89, 634,971.94 and 366,959.76 is: 551,593.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,428.89 : 634,971.94 = 366,959.76 : x
  2. Step 2: Convert to fraction form
    422,428.89/634,971.94 = 366,959.76/x
  3. Step 3: Cross multiply
    422,428.89x = 634,971.94 × 366,959.76
  4. Step 4: Simplify right side
    422,428.89x = 233,009,150,709.13
  5. Step 5: Solve for x
    x = 233,009,150,709.13/422,428.89
  6. Step 6: Final answer
    x = 551,593.79

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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.