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Finding the Fourth Proportional to 820,133.60, 1,230,200.40 and 755,179.70

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Solution

The fourth proportional to 820,133.60, 1,230,200.40 and 755,179.70 is: 1,132,769.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,133.60 : 1,230,200.40 = 755,179.70 : x
  2. Step 2: Convert to fraction form
    820,133.60/1,230,200.40 = 755,179.70/x
  3. Step 3: Cross multiply
    820,133.60x = 1,230,200.40 × 755,179.70
  4. Step 4: Simplify right side
    820,133.60x = 929,022,369,011.88
  5. Step 5: Solve for x
    x = 929,022,369,011.88/820,133.60
  6. Step 6: Final answer
    x = 1,132,769.55

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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.