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Finding the Fourth Proportional to 605,091.20, 907,636.80 and 521,110.40

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Solution

The fourth proportional to 605,091.20, 907,636.80 and 521,110.40 is: 781,665.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,091.20 : 907,636.80 = 521,110.40 : x
  2. Step 2: Convert to fraction form
    605,091.20/907,636.80 = 521,110.40/x
  3. Step 3: Cross multiply
    605,091.20x = 907,636.80 × 521,110.40
  4. Step 4: Simplify right side
    605,091.20x = 472,978,975,902.72
  5. Step 5: Solve for x
    x = 472,978,975,902.72/605,091.20
  6. Step 6: Final answer
    x = 781,665.60

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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.