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Finding the Fourth Proportional to 605,365.50, 905,806.26 and 378,921.90

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Solution

The fourth proportional to 605,365.50, 905,806.26 and 378,921.90 is: 566,979.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,365.50 : 905,806.26 = 378,921.90 : x
  2. Step 2: Convert to fraction form
    605,365.50/905,806.26 = 378,921.90/x
  3. Step 3: Cross multiply
    605,365.50x = 905,806.26 × 378,921.90
  4. Step 4: Simplify right side
    605,365.50x = 343,229,829,071.09
  5. Step 5: Solve for x
    x = 343,229,829,071.09/605,365.50
  6. Step 6: Final answer
    x = 566,979.50

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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.