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Finding the Fourth Proportional to 354,326.20, 531,489.30 and 338,968.60

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Solution

The fourth proportional to 354,326.20, 531,489.30 and 338,968.60 is: 508,452.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,326.20 : 531,489.30 = 338,968.60 : x
  2. Step 2: Convert to fraction form
    354,326.20/531,489.30 = 338,968.60/x
  3. Step 3: Cross multiply
    354,326.20x = 531,489.30 × 338,968.60
  4. Step 4: Simplify right side
    354,326.20x = 180,158,183,935.98
  5. Step 5: Solve for x
    x = 180,158,183,935.98/354,326.20
  6. Step 6: Final answer
    x = 508,452.90

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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.