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Finding the Fourth Proportional to 641,945.79, 885,874.34 and 355,459.73

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Solution

The fourth proportional to 641,945.79, 885,874.34 and 355,459.73 is: 490,528.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,945.79 : 885,874.34 = 355,459.73 : x
  2. Step 2: Convert to fraction form
    641,945.79/885,874.34 = 355,459.73/x
  3. Step 3: Cross multiply
    641,945.79x = 885,874.34 × 355,459.73
  4. Step 4: Simplify right side
    641,945.79x = 314,892,647,503.66
  5. Step 5: Solve for x
    x = 314,892,647,503.66/641,945.79
  6. Step 6: Final answer
    x = 490,528.41

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