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Finding the Fourth Proportional to 915,855.07, 1,372,813 and 308,064.78

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Solution

The fourth proportional to 915,855.07, 1,372,813 and 308,064.78 is: 461,771.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    915,855.07 : 1,372,813 = 308,064.78 : x
  2. Step 2: Convert to fraction form
    915,855.07/1,372,813 = 308,064.78/x
  3. Step 3: Cross multiply
    915,855.07x = 1,372,813 × 308,064.78
  4. Step 4: Simplify right side
    915,855.07x = 422,915,334,826.14
  5. Step 5: Solve for x
    x = 422,915,334,826.14/915,855.07
  6. Step 6: Final answer
    x = 461,771.03

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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.