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Finding the Fourth Proportional to 383,619.64, 529,446.42 and 220,340.44

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Solution

The fourth proportional to 383,619.64, 529,446.42 and 220,340.44 is: 304,099.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,619.64 : 529,446.42 = 220,340.44 : x
  2. Step 2: Convert to fraction form
    383,619.64/529,446.42 = 220,340.44/x
  3. Step 3: Cross multiply
    383,619.64x = 529,446.42 × 220,340.44
  4. Step 4: Simplify right side
    383,619.64x = 116,658,457,139.23
  5. Step 5: Solve for x
    x = 116,658,457,139.23/383,619.64
  6. Step 6: Final answer
    x = 304,099.28

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.