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Finding the Fourth Proportional to 327,041.92, 490,485.12 and 90,379.36

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Solution

The fourth proportional to 327,041.92, 490,485.12 and 90,379.36 is: 135,547.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    327,041.92 : 490,485.12 = 90,379.36 : x
  2. Step 2: Convert to fraction form
    327,041.92/490,485.12 = 90,379.36/x
  3. Step 3: Cross multiply
    327,041.92x = 490,485.12 × 90,379.36
  4. Step 4: Simplify right side
    327,041.92x = 44,329,731,235.12
  5. Step 5: Solve for x
    x = 44,329,731,235.12/327,041.92
  6. Step 6: Final answer
    x = 135,547.55

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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.