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Finding the Fourth Proportional to 326,518.80, 489,778.20 and 220,230.60

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Solution

The fourth proportional to 326,518.80, 489,778.20 and 220,230.60 is: 330,345.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,518.80 : 489,778.20 = 220,230.60 : x
  2. Step 2: Convert to fraction form
    326,518.80/489,778.20 = 220,230.60/x
  3. Step 3: Cross multiply
    326,518.80x = 489,778.20 × 220,230.60
  4. Step 4: Simplify right side
    326,518.80x = 107,864,146,852.92
  5. Step 5: Solve for x
    x = 107,864,146,852.92/326,518.80
  6. Step 6: Final answer
    x = 330,345.90

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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.