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Finding the Fourth Proportional to 511,391.85, 767,087.69 and 485,821.04

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Solution

The fourth proportional to 511,391.85, 767,087.69 and 485,821.04 is: 728,731.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    511,391.85 : 767,087.69 = 485,821.04 : x
  2. Step 2: Convert to fraction form
    511,391.85/767,087.69 = 485,821.04/x
  3. Step 3: Cross multiply
    511,391.85x = 767,087.69 × 485,821.04
  4. Step 4: Simplify right side
    511,391.85x = 372,667,333,062.45
  5. Step 5: Solve for x
    x = 372,667,333,062.45/511,391.85
  6. Step 6: Final answer
    x = 728,731.47

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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.