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Finding the Fourth Proportional to 326,815.60, 490,223.40 and 214,841.20

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Solution

The fourth proportional to 326,815.60, 490,223.40 and 214,841.20 is: 322,261.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,815.60 : 490,223.40 = 214,841.20 : x
  2. Step 2: Convert to fraction form
    326,815.60/490,223.40 = 214,841.20/x
  3. Step 3: Cross multiply
    326,815.60x = 490,223.40 × 214,841.20
  4. Step 4: Simplify right side
    326,815.60x = 105,320,183,524.08
  5. Step 5: Solve for x
    x = 105,320,183,524.08/326,815.60
  6. Step 6: Final answer
    x = 322,261.80

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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.