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Finding the Fourth Proportional to 633,558.60, 874,310.82 and 378,909.78

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Solution

The fourth proportional to 633,558.60, 874,310.82 and 378,909.78 is: 522,895.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    633,558.60 : 874,310.82 = 378,909.78 : x
  2. Step 2: Convert to fraction form
    633,558.60/874,310.82 = 378,909.78/x
  3. Step 3: Cross multiply
    633,558.60x = 874,310.82 × 378,909.78
  4. Step 4: Simplify right side
    633,558.60x = 331,284,920,457.82
  5. Step 5: Solve for x
    x = 331,284,920,457.82/633,558.60
  6. Step 6: Final answer
    x = 522,895.47

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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.