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Finding the Fourth Proportional to 326,759.28, 489,790.44 and 186,215.28

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Solution

The fourth proportional to 326,759.28, 489,790.44 and 186,215.28 is: 279,124.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,759.28 : 489,790.44 = 186,215.28 : x
  2. Step 2: Convert to fraction form
    326,759.28/489,790.44 = 186,215.28/x
  3. Step 3: Cross multiply
    326,759.28x = 489,790.44 × 186,215.28
  4. Step 4: Simplify right side
    326,759.28x = 91,206,463,925.92
  5. Step 5: Solve for x
    x = 91,206,463,925.92/326,759.28
  6. Step 6: Final answer
    x = 279,124.33

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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.