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Finding the Fourth Proportional to 275,999.90, 413,999.85 and 143,139.65

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Solution

The fourth proportional to 275,999.90, 413,999.85 and 143,139.65 is: 214,709.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,999.90 : 413,999.85 = 143,139.65 : x
  2. Step 2: Convert to fraction form
    275,999.90/413,999.85 = 143,139.65/x
  3. Step 3: Cross multiply
    275,999.90x = 413,999.85 × 143,139.65
  4. Step 4: Simplify right side
    275,999.90x = 59,259,793,629.05
  5. Step 5: Solve for x
    x = 59,259,793,629.05/275,999.90
  6. Step 6: Final answer
    x = 214,709.48

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1.5x scale

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.