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Finding the Fourth Proportional to 323,517.60, 485,276.40 and 266,436.90

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Solution

The fourth proportional to 323,517.60, 485,276.40 and 266,436.90 is: 399,655.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,517.60 : 485,276.40 = 266,436.90 : x
  2. Step 2: Convert to fraction form
    323,517.60/485,276.40 = 266,436.90/x
  3. Step 3: Cross multiply
    323,517.60x = 485,276.40 × 266,436.90
  4. Step 4: Simplify right side
    323,517.60x = 129,295,539,659.16
  5. Step 5: Solve for x
    x = 129,295,539,659.16/323,517.60
  6. Step 6: Final answer
    x = 399,655.35

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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.