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Finding the Fourth Proportional to 403,411.80, 605,491.60 and 203,872.64

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Solution

The fourth proportional to 403,411.80, 605,491.60 and 203,872.64 is: 305,997.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,411.80 : 605,491.60 = 203,872.64 : x
  2. Step 2: Convert to fraction form
    403,411.80/605,491.60 = 203,872.64/x
  3. Step 3: Cross multiply
    403,411.80x = 605,491.60 × 203,872.64
  4. Step 4: Simplify right side
    403,411.80x = 123,443,170,989.82
  5. Step 5: Solve for x
    x = 123,443,170,989.82/403,411.80
  6. Step 6: Final answer
    x = 305,997.92

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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.