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Finding the Fourth Proportional to 605,086.20, 907,629.30 and 521,105.40

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Solution

The fourth proportional to 605,086.20, 907,629.30 and 521,105.40 is: 781,658.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,086.20 : 907,629.30 = 521,105.40 : x
  2. Step 2: Convert to fraction form
    605,086.20/907,629.30 = 521,105.40/x
  3. Step 3: Cross multiply
    605,086.20x = 907,629.30 × 521,105.40
  4. Step 4: Simplify right side
    605,086.20x = 472,970,529,428.22
  5. Step 5: Solve for x
    x = 472,970,529,428.22/605,086.20
  6. Step 6: Final answer
    x = 781,658.10

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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.