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Finding the Fourth Proportional to 413,722.80, 620,584.20 and 272,005.20

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Solution

The fourth proportional to 413,722.80, 620,584.20 and 272,005.20 is: 408,007.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    413,722.80 : 620,584.20 = 272,005.20 : x
  2. Step 2: Convert to fraction form
    413,722.80/620,584.20 = 272,005.20/x
  3. Step 3: Cross multiply
    413,722.80x = 620,584.20 × 272,005.20
  4. Step 4: Simplify right side
    413,722.80x = 168,802,129,437.84
  5. Step 5: Solve for x
    x = 168,802,129,437.84/413,722.80
  6. Step 6: Final answer
    x = 408,007.80

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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.