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Finding the Fourth Proportional to 405,623.20, 608,434.80 and 272,912.80

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Solution

The fourth proportional to 405,623.20, 608,434.80 and 272,912.80 is: 409,369.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,623.20 : 608,434.80 = 272,912.80 : x
  2. Step 2: Convert to fraction form
    405,623.20/608,434.80 = 272,912.80/x
  3. Step 3: Cross multiply
    405,623.20x = 608,434.80 × 272,912.80
  4. Step 4: Simplify right side
    405,623.20x = 166,049,644,885.44
  5. Step 5: Solve for x
    x = 166,049,644,885.44/405,623.20
  6. Step 6: Final answer
    x = 409,369.20

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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.