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Finding the Fourth Proportional to 263,618.70, 395,136.45 and 145,374.90

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Solution

The fourth proportional to 263,618.70, 395,136.45 and 145,374.90 is: 217,901.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,618.70 : 395,136.45 = 145,374.90 : x
  2. Step 2: Convert to fraction form
    263,618.70/395,136.45 = 145,374.90/x
  3. Step 3: Cross multiply
    263,618.70x = 395,136.45 × 145,374.90
  4. Step 4: Simplify right side
    263,618.70x = 57,442,921,905.11
  5. Step 5: Solve for x
    x = 57,442,921,905.11/263,618.70
  6. Step 6: Final answer
    x = 217,901.54

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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.