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Finding the Fourth Proportional to 820,634.90, 1,227,999.90 and 554,914.40

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Solution

The fourth proportional to 820,634.90, 1,227,999.90 and 554,914.40 is: 830,375.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,634.90 : 1,227,999.90 = 554,914.40 : x
  2. Step 2: Convert to fraction form
    820,634.90/1,227,999.90 = 554,914.40/x
  3. Step 3: Cross multiply
    820,634.90x = 1,227,999.90 × 554,914.40
  4. Step 4: Simplify right side
    820,634.90x = 681,434,827,708.56
  5. Step 5: Solve for x
    x = 681,434,827,708.56/820,634.90
  6. Step 6: Final answer
    x = 830,375.15

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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.