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Finding the Fourth Proportional to 605,749.80, 907,640.55 and 521,112.90

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Solution

The fourth proportional to 605,749.80, 907,640.55 and 521,112.90 is: 780,822.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,749.80 : 907,640.55 = 521,112.90 : x
  2. Step 2: Convert to fraction form
    605,749.80/907,640.55 = 521,112.90/x
  3. Step 3: Cross multiply
    605,749.80x = 907,640.55 × 521,112.90
  4. Step 4: Simplify right side
    605,749.80x = 472,983,199,168.10
  5. Step 5: Solve for x
    x = 472,983,199,168.10/605,749.80
  6. Step 6: Final answer
    x = 780,822.71

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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.