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Finding the Fourth Proportional to 526,362.20, 789,536 and 126,999.64

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Solution

The fourth proportional to 526,362.20, 789,536 and 126,999.64 is: 190,497.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    526,362.20 : 789,536 = 126,999.64 : x
  2. Step 2: Convert to fraction form
    526,362.20/789,536 = 126,999.64/x
  3. Step 3: Cross multiply
    526,362.20x = 789,536 × 126,999.64
  4. Step 4: Simplify right side
    526,362.20x = 100,270,787,767.04
  5. Step 5: Solve for x
    x = 100,270,787,767.04/526,362.20
  6. Step 6: Final answer
    x = 190,497.70

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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.