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Finding the Fourth Proportional to 326,760.78, 489,792.69 and 186,216.78

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Solution

The fourth proportional to 326,760.78, 489,792.69 and 186,216.78 is: 279,126.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,760.78 : 489,792.69 = 186,216.78 : x
  2. Step 2: Convert to fraction form
    326,760.78/489,792.69 = 186,216.78/x
  3. Step 3: Cross multiply
    326,760.78x = 489,792.69 × 186,216.78
  4. Step 4: Simplify right side
    326,760.78x = 91,207,617,599.34
  5. Step 5: Solve for x
    x = 91,207,617,599.34/326,760.78
  6. Step 6: Final answer
    x = 279,126.58

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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.