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Finding the Fourth Proportional to 326,515.60, 489,168.60 and 185,856.40

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Solution

The fourth proportional to 326,515.60, 489,168.60 and 185,856.40 is: 278,440.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,515.60 : 489,168.60 = 185,856.40 : x
  2. Step 2: Convert to fraction form
    326,515.60/489,168.60 = 185,856.40/x
  3. Step 3: Cross multiply
    326,515.60x = 489,168.60 × 185,856.40
  4. Step 4: Simplify right side
    326,515.60x = 90,915,114,989.04
  5. Step 5: Solve for x
    x = 90,915,114,989.04/326,515.60
  6. Step 6: Final answer
    x = 278,440.34

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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.