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Finding the Fourth Proportional to 309,912.40, 464,998.20 and 99,614.80

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Solution

The fourth proportional to 309,912.40, 464,998.20 and 99,614.80 is: 149,463.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,912.40 : 464,998.20 = 99,614.80 : x
  2. Step 2: Convert to fraction form
    309,912.40/464,998.20 = 99,614.80/x
  3. Step 3: Cross multiply
    309,912.40x = 464,998.20 × 99,614.80
  4. Step 4: Simplify right side
    309,912.40x = 46,320,702,693.36
  5. Step 5: Solve for x
    x = 46,320,702,693.36/309,912.40
  6. Step 6: Final answer
    x = 149,463.86

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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.