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Finding the Fourth Proportional to 415,800, 623,738.88 and 135,241.92

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Solution

The fourth proportional to 415,800, 623,738.88 and 135,241.92 is: 202,875.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    415,800 : 623,738.88 = 135,241.92 : x
  2. Step 2: Convert to fraction form
    415,800/623,738.88 = 135,241.92/x
  3. Step 3: Cross multiply
    415,800x = 623,738.88 × 135,241.92
  4. Step 4: Simplify right side
    415,800x = 84,355,643,709.85
  5. Step 5: Solve for x
    x = 84,355,643,709.85/415,800
  6. Step 6: Final answer
    x = 202,875.53

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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.