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Finding the Fourth Proportional to 270,008.80, 405,013.20 and 220,145.20

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Solution

The fourth proportional to 270,008.80, 405,013.20 and 220,145.20 is: 330,217.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,008.80 : 405,013.20 = 220,145.20 : x
  2. Step 2: Convert to fraction form
    270,008.80/405,013.20 = 220,145.20/x
  3. Step 3: Cross multiply
    270,008.80x = 405,013.20 × 220,145.20
  4. Step 4: Simplify right side
    270,008.80x = 89,161,711,916.64
  5. Step 5: Solve for x
    x = 89,161,711,916.64/270,008.80
  6. Step 6: Final answer
    x = 330,217.80

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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.