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Finding the Fourth Proportional to 323,517.10, 485,275.65 and 266,436.40

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Solution

The fourth proportional to 323,517.10, 485,275.65 and 266,436.40 is: 399,654.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,517.10 : 485,275.65 = 266,436.40 : x
  2. Step 2: Convert to fraction form
    323,517.10/485,275.65 = 266,436.40/x
  3. Step 3: Cross multiply
    323,517.10x = 485,275.65 × 266,436.40
  4. Step 4: Simplify right side
    323,517.10x = 129,295,097,193.66
  5. Step 5: Solve for x
    x = 129,295,097,193.66/323,517.10
  6. Step 6: Final answer
    x = 399,654.60

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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.