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Finding the Fourth Proportional to 326,890.80, 490,336.20 and 274,402.80

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Solution

The fourth proportional to 326,890.80, 490,336.20 and 274,402.80 is: 411,604.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,890.80 : 490,336.20 = 274,402.80 : x
  2. Step 2: Convert to fraction form
    326,890.80/490,336.20 = 274,402.80/x
  3. Step 3: Cross multiply
    326,890.80x = 490,336.20 × 274,402.80
  4. Step 4: Simplify right side
    326,890.80x = 134,549,626,221.36
  5. Step 5: Solve for x
    x = 134,549,626,221.36/326,890.80
  6. Step 6: Final answer
    x = 411,604.20

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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.