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Finding the Fourth Proportional to 643,313.80, 965,316.30 and 269,374.60

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Solution

The fourth proportional to 643,313.80, 965,316.30 and 269,374.60 is: 404,206.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,313.80 : 965,316.30 = 269,374.60 : x
  2. Step 2: Convert to fraction form
    643,313.80/965,316.30 = 269,374.60/x
  3. Step 3: Cross multiply
    643,313.80x = 965,316.30 × 269,374.60
  4. Step 4: Simplify right side
    643,313.80x = 260,031,692,185.98
  5. Step 5: Solve for x
    x = 260,031,692,185.98/643,313.80
  6. Step 6: Final answer
    x = 404,206.61

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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.