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Finding the Fourth Proportional to 326,029.20, 489,043.80 and 139,059.60

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Solution

The fourth proportional to 326,029.20, 489,043.80 and 139,059.60 is: 208,589.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,029.20 : 489,043.80 = 139,059.60 : x
  2. Step 2: Convert to fraction form
    326,029.20/489,043.80 = 139,059.60/x
  3. Step 3: Cross multiply
    326,029.20x = 489,043.80 × 139,059.60
  4. Step 4: Simplify right side
    326,029.20x = 68,006,235,210.48
  5. Step 5: Solve for x
    x = 68,006,235,210.48/326,029.20
  6. Step 6: Final answer
    x = 208,589.40

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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.