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Finding the Fourth Proportional to 543,279.90, 814,883.40 and 143,912.10

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Solution

The fourth proportional to 543,279.90, 814,883.40 and 143,912.10 is: 215,858.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,279.90 : 814,883.40 = 143,912.10 : x
  2. Step 2: Convert to fraction form
    543,279.90/814,883.40 = 143,912.10/x
  3. Step 3: Cross multiply
    543,279.90x = 814,883.40 × 143,912.10
  4. Step 4: Simplify right side
    543,279.90x = 117,271,581,349.14
  5. Step 5: Solve for x
    x = 117,271,581,349.14/543,279.90
  6. Step 6: Final answer
    x = 215,858.49

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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.