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Finding the Fourth Proportional to 456,435.76, 684,361.96 and 219,306.64

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Solution

The fourth proportional to 456,435.76, 684,361.96 and 219,306.64 is: 328,819.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,435.76 : 684,361.96 = 219,306.64 : x
  2. Step 2: Convert to fraction form
    456,435.76/684,361.96 = 219,306.64/x
  3. Step 3: Cross multiply
    456,435.76x = 684,361.96 × 219,306.64
  4. Step 4: Simplify right side
    456,435.76x = 150,085,121,991.41
  5. Step 5: Solve for x
    x = 150,085,121,991.41/456,435.76
  6. Step 6: Final answer
    x = 328,819.81

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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.