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Finding the Fourth Proportional to 379,626.80, 569,658.90 and 143,139.20

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Solution

The fourth proportional to 379,626.80, 569,658.90 and 143,139.20 is: 214,791.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    379,626.80 : 569,658.90 = 143,139.20 : x
  2. Step 2: Convert to fraction form
    379,626.80/569,658.90 = 143,139.20/x
  3. Step 3: Cross multiply
    379,626.80x = 569,658.90 × 143,139.20
  4. Step 4: Simplify right side
    379,626.80x = 81,540,519,218.88
  5. Step 5: Solve for x
    x = 81,540,519,218.88/379,626.80
  6. Step 6: Final answer
    x = 214,791.26

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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.