Home / 543,438.10-815,771.55-419,329.30

Finding the Fourth Proportional to 543,438.10, 815,771.55 and 419,329.30

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Solution

The fourth proportional to 543,438.10, 815,771.55 and 419,329.30 is: 629,468.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,438.10 : 815,771.55 = 419,329.30 : x
  2. Step 2: Convert to fraction form
    543,438.10/815,771.55 = 419,329.30/x
  3. Step 3: Cross multiply
    543,438.10x = 815,771.55 × 419,329.30
  4. Step 4: Simplify right side
    543,438.10x = 342,076,913,021.42
  5. Step 5: Solve for x
    x = 342,076,913,021.42/543,438.10
  6. Step 6: Final answer
    x = 629,468.04

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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.