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Finding the Fourth Proportional to 820,325.20, 1,230,487.80 and 745,529.80

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Solution

The fourth proportional to 820,325.20, 1,230,487.80 and 745,529.80 is: 1,118,294.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,325.20 : 1,230,487.80 = 745,529.80 : x
  2. Step 2: Convert to fraction form
    820,325.20/1,230,487.80 = 745,529.80/x
  3. Step 3: Cross multiply
    820,325.20x = 1,230,487.80 × 745,529.80
  4. Step 4: Simplify right side
    820,325.20x = 917,365,323,436.44
  5. Step 5: Solve for x
    x = 917,365,323,436.44/820,325.20
  6. Step 6: Final answer
    x = 1,118,294.70

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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.