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Finding the Fourth Proportional to 279,664.20, 418,840.20 and 190,434.60

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Solution

The fourth proportional to 279,664.20, 418,840.20 and 190,434.60 is: 285,205.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,664.20 : 418,840.20 = 190,434.60 : x
  2. Step 2: Convert to fraction form
    279,664.20/418,840.20 = 190,434.60/x
  3. Step 3: Cross multiply
    279,664.20x = 418,840.20 × 190,434.60
  4. Step 4: Simplify right side
    279,664.20x = 79,761,665,950.92
  5. Step 5: Solve for x
    x = 79,761,665,950.92/279,664.20
  6. Step 6: Final answer
    x = 285,205.14

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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.