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Finding the Fourth Proportional to 646,564.80, 969,847.20 and 247,218.60

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Solution

The fourth proportional to 646,564.80, 969,847.20 and 247,218.60 is: 370,827.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,564.80 : 969,847.20 = 247,218.60 : x
  2. Step 2: Convert to fraction form
    646,564.80/969,847.20 = 247,218.60/x
  3. Step 3: Cross multiply
    646,564.80x = 969,847.20 × 247,218.60
  4. Step 4: Simplify right side
    646,564.80x = 239,764,266,997.92
  5. Step 5: Solve for x
    x = 239,764,266,997.92/646,564.80
  6. Step 6: Final answer
    x = 370,827.90

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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.