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Finding the Fourth Proportional to 613,309.20, 919,963.80 and 276,729.90

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Solution

The fourth proportional to 613,309.20, 919,963.80 and 276,729.90 is: 415,094.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    613,309.20 : 919,963.80 = 276,729.90 : x
  2. Step 2: Convert to fraction form
    613,309.20/919,963.80 = 276,729.90/x
  3. Step 3: Cross multiply
    613,309.20x = 919,963.80 × 276,729.90
  4. Step 4: Simplify right side
    613,309.20x = 254,581,490,377.62
  5. Step 5: Solve for x
    x = 254,581,490,377.62/613,309.20
  6. Step 6: Final answer
    x = 415,094.85

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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.