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Finding the Fourth Proportional to 387,099.50, 580,732.20 and 134,388

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Solution

The fourth proportional to 387,099.50, 580,732.20 and 134,388 is: 201,610.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,099.50 : 580,732.20 = 134,388 : x
  2. Step 2: Convert to fraction form
    387,099.50/580,732.20 = 134,388/x
  3. Step 3: Cross multiply
    387,099.50x = 580,732.20 × 134,388
  4. Step 4: Simplify right side
    387,099.50x = 78,043,438,893.60
  5. Step 5: Solve for x
    x = 78,043,438,893.60/387,099.50
  6. Step 6: Final answer
    x = 201,610.80

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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.