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Finding the Fourth Proportional to 633,556.56, 874,308.08 and 378,907.80

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Solution

The fourth proportional to 633,556.56, 874,308.08 and 378,907.80 is: 522,892.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    633,556.56 : 874,308.08 = 378,907.80 : x
  2. Step 2: Convert to fraction form
    633,556.56/874,308.08 = 378,907.80/x
  3. Step 3: Cross multiply
    633,556.56x = 874,308.08 × 378,907.80
  4. Step 4: Simplify right side
    633,556.56x = 331,282,151,115.02
  5. Step 5: Solve for x
    x = 331,282,151,115.02/633,556.56
  6. Step 6: Final answer
    x = 522,892.78

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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.