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Finding the Fourth Proportional to 326,719.20, 490,078.80 and 193,530.90

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Solution

The fourth proportional to 326,719.20, 490,078.80 and 193,530.90 is: 290,296.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,719.20 : 490,078.80 = 193,530.90 : x
  2. Step 2: Convert to fraction form
    326,719.20/490,078.80 = 193,530.90/x
  3. Step 3: Cross multiply
    326,719.20x = 490,078.80 × 193,530.90
  4. Step 4: Simplify right side
    326,719.20x = 94,845,391,234.92
  5. Step 5: Solve for x
    x = 94,845,391,234.92/326,719.20
  6. Step 6: Final answer
    x = 290,296.35

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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.