Home / 339,939.10-509,908.65-318,943.90

Finding the Fourth Proportional to 339,939.10, 509,908.65 and 318,943.90

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Solution

The fourth proportional to 339,939.10, 509,908.65 and 318,943.90 is: 478,415.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,939.10 : 509,908.65 = 318,943.90 : x
  2. Step 2: Convert to fraction form
    339,939.10/509,908.65 = 318,943.90/x
  3. Step 3: Cross multiply
    339,939.10x = 509,908.65 × 318,943.90
  4. Step 4: Simplify right side
    339,939.10x = 162,632,253,474.74
  5. Step 5: Solve for x
    x = 162,632,253,474.74/339,939.10
  6. Step 6: Final answer
    x = 478,415.85

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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.