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Finding the Fourth Proportional to 275,999.40, 413,999.10 and 143,139.15

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Solution

The fourth proportional to 275,999.40, 413,999.10 and 143,139.15 is: 214,708.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,999.40 : 413,999.10 = 143,139.15 : x
  2. Step 2: Convert to fraction form
    275,999.40/413,999.10 = 143,139.15/x
  3. Step 3: Cross multiply
    275,999.40x = 413,999.10 × 143,139.15
  4. Step 4: Simplify right side
    275,999.40x = 59,259,479,274.77
  5. Step 5: Solve for x
    x = 59,259,479,274.77/275,999.40
  6. Step 6: Final answer
    x = 214,708.73

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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.