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Finding the Fourth Proportional to 511,857.20, 767,843.40 and 156,868.40

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Solution

The fourth proportional to 511,857.20, 767,843.40 and 156,868.40 is: 235,320.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    511,857.20 : 767,843.40 = 156,868.40 : x
  2. Step 2: Convert to fraction form
    511,857.20/767,843.40 = 156,868.40/x
  3. Step 3: Cross multiply
    511,857.20x = 767,843.40 × 156,868.40
  4. Step 4: Simplify right side
    511,857.20x = 120,450,365,608.56
  5. Step 5: Solve for x
    x = 120,450,365,608.56/511,857.20
  6. Step 6: Final answer
    x = 235,320.25

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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.