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Finding the Fourth Proportional to 409,409.80, 613,458.60 and 259,381.60

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Solution

The fourth proportional to 409,409.80, 613,458.60 and 259,381.60 is: 388,656.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    409,409.80 : 613,458.60 = 259,381.60 : x
  2. Step 2: Convert to fraction form
    409,409.80/613,458.60 = 259,381.60/x
  3. Step 3: Cross multiply
    409,409.80x = 613,458.60 × 259,381.60
  4. Step 4: Simplify right side
    409,409.80x = 159,119,873,201.76
  5. Step 5: Solve for x
    x = 159,119,873,201.76/409,409.80
  6. Step 6: Final answer
    x = 388,656.73

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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.