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Finding the Fourth Proportional to 423,237.21, 634,843.49 and 123,724.82

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Solution

The fourth proportional to 423,237.21, 634,843.49 and 123,724.82 is: 185,583.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,237.21 : 634,843.49 = 123,724.82 : x
  2. Step 2: Convert to fraction form
    423,237.21/634,843.49 = 123,724.82/x
  3. Step 3: Cross multiply
    423,237.21x = 634,843.49 × 123,724.82
  4. Step 4: Simplify right side
    423,237.21x = 78,545,896,528.42
  5. Step 5: Solve for x
    x = 78,545,896,528.42/423,237.21
  6. Step 6: Final answer
    x = 185,583.63

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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.