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Finding the Fourth Proportional to 820,640.80, 1,230,961.20 and 710,048.80

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Solution

The fourth proportional to 820,640.80, 1,230,961.20 and 710,048.80 is: 1,065,073.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,640.80 : 1,230,961.20 = 710,048.80 : x
  2. Step 2: Convert to fraction form
    820,640.80/1,230,961.20 = 710,048.80/x
  3. Step 3: Cross multiply
    820,640.80x = 1,230,961.20 × 710,048.80
  4. Step 4: Simplify right side
    820,640.80x = 874,042,522,906.56
  5. Step 5: Solve for x
    x = 874,042,522,906.56/820,640.80
  6. Step 6: Final answer
    x = 1,065,073.20

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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.