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Finding the Fourth Proportional to 326,812.80, 490,219.20 and 259,890.60

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Solution

The fourth proportional to 326,812.80, 490,219.20 and 259,890.60 is: 389,835.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,812.80 : 490,219.20 = 259,890.60 : x
  2. Step 2: Convert to fraction form
    326,812.80/490,219.20 = 259,890.60/x
  3. Step 3: Cross multiply
    326,812.80x = 490,219.20 × 259,890.60
  4. Step 4: Simplify right side
    326,812.80x = 127,403,362,019.52
  5. Step 5: Solve for x
    x = 127,403,362,019.52/326,812.80
  6. Step 6: Final answer
    x = 389,835.90

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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.