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Finding the Fourth Proportional to 326,539.20, 489,160.80 and 287,572.80

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Solution

The fourth proportional to 326,539.20, 489,160.80 and 287,572.80 is: 430,788.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,539.20 : 489,160.80 = 287,572.80 : x
  2. Step 2: Convert to fraction form
    326,539.20/489,160.80 = 287,572.80/x
  3. Step 3: Cross multiply
    326,539.20x = 489,160.80 × 287,572.80
  4. Step 4: Simplify right side
    326,539.20x = 140,669,340,906.24
  5. Step 5: Solve for x
    x = 140,669,340,906.24/326,539.20
  6. Step 6: Final answer
    x = 430,788.53

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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.