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Finding the Fourth Proportional to 456,361.20, 684,736.20 and 288,010.80

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Solution

The fourth proportional to 456,361.20, 684,736.20 and 288,010.80 is: 432,138.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    456,361.20 : 684,736.20 = 288,010.80 : x
  2. Step 2: Convert to fraction form
    456,361.20/684,736.20 = 288,010.80/x
  3. Step 3: Cross multiply
    456,361.20x = 684,736.20 × 288,010.80
  4. Step 4: Simplify right side
    456,361.20x = 197,211,420,750.96
  5. Step 5: Solve for x
    x = 197,211,420,750.96/456,361.20
  6. Step 6: Final answer
    x = 432,138.89

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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.