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Finding the Fourth Proportional to 326,419.20, 488,980.80 and 287,452.80

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Solution

The fourth proportional to 326,419.20, 488,980.80 and 287,452.80 is: 430,608.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,419.20 : 488,980.80 = 287,452.80 : x
  2. Step 2: Convert to fraction form
    326,419.20/488,980.80 = 287,452.80/x
  3. Step 3: Cross multiply
    326,419.20x = 488,980.80 × 287,452.80
  4. Step 4: Simplify right side
    326,419.20x = 140,558,900,106.24
  5. Step 5: Solve for x
    x = 140,558,900,106.24/326,419.20
  6. Step 6: Final answer
    x = 430,608.56

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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.