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Finding the Fourth Proportional to 642,107.09, 886,115.22 and 355,631.96

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Solution

The fourth proportional to 642,107.09, 886,115.22 and 355,631.96 is: 490,776.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    642,107.09 : 886,115.22 = 355,631.96 : x
  2. Step 2: Convert to fraction form
    642,107.09/886,115.22 = 355,631.96/x
  3. Step 3: Cross multiply
    642,107.09x = 886,115.22 × 355,631.96
  4. Step 4: Simplify right side
    642,107.09x = 315,130,892,474.43
  5. Step 5: Solve for x
    x = 315,130,892,474.43/642,107.09
  6. Step 6: Final answer
    x = 490,776.22

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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.