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Finding the Fourth Proportional to 641,999.22, 885,958.12 and 355,518.96

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Solution

The fourth proportional to 641,999.22, 885,958.12 and 355,518.96 is: 490,615.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,999.22 : 885,958.12 = 355,518.96 : x
  2. Step 2: Convert to fraction form
    641,999.22/885,958.12 = 355,518.96/x
  3. Step 3: Cross multiply
    641,999.22x = 885,958.12 × 355,518.96
  4. Step 4: Simplify right side
    641,999.22x = 314,974,904,107.37
  5. Step 5: Solve for x
    x = 314,974,904,107.37/641,999.22
  6. Step 6: Final answer
    x = 490,615.72

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1.5x scale

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.