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Finding the Fourth Proportional to 326,993.86, 490,485.93 and 90,331.30

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Solution

The fourth proportional to 326,993.86, 490,485.93 and 90,331.30 is: 135,495.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,993.86 : 490,485.93 = 90,331.30 : x
  2. Step 2: Convert to fraction form
    326,993.86/490,485.93 = 90,331.30/x
  3. Step 3: Cross multiply
    326,993.86x = 490,485.93 × 90,331.30
  4. Step 4: Simplify right side
    326,993.86x = 44,306,231,688.61
  5. Step 5: Solve for x
    x = 44,306,231,688.61/326,993.86
  6. Step 6: Final answer
    x = 135,495.61

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1.5x scale

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.