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Finding the Fourth Proportional to 326,022.60, 489,033.90 and 215,214.60

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Solution

The fourth proportional to 326,022.60, 489,033.90 and 215,214.60 is: 322,821.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,022.60 : 489,033.90 = 215,214.60 : x
  2. Step 2: Convert to fraction form
    326,022.60/489,033.90 = 215,214.60/x
  3. Step 3: Cross multiply
    326,022.60x = 489,033.90 × 215,214.60
  4. Step 4: Simplify right side
    326,022.60x = 105,247,235,174.94
  5. Step 5: Solve for x
    x = 105,247,235,174.94/326,022.60
  6. Step 6: Final answer
    x = 322,821.90

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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.