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Finding the Fourth Proportional to 351,435.38, 485,068.30 and 200,619.86

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Solution

The fourth proportional to 351,435.38, 485,068.30 and 200,619.86 is: 276,905.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,435.38 : 485,068.30 = 200,619.86 : x
  2. Step 2: Convert to fraction form
    351,435.38/485,068.30 = 200,619.86/x
  3. Step 3: Cross multiply
    351,435.38x = 485,068.30 × 200,619.86
  4. Step 4: Simplify right side
    351,435.38x = 97,314,331,509.55
  5. Step 5: Solve for x
    x = 97,314,331,509.55/351,435.38
  6. Step 6: Final answer
    x = 276,905.34

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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.