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Finding the Fourth Proportional to 422,529, 583,090.02 and 243,681

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Solution

The fourth proportional to 422,529, 583,090.02 and 243,681 is: 336,279.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,529 : 583,090.02 = 243,681 : x
  2. Step 2: Convert to fraction form
    422,529/583,090.02 = 243,681/x
  3. Step 3: Cross multiply
    422,529x = 583,090.02 × 243,681
  4. Step 4: Simplify right side
    422,529x = 142,087,959,163.62
  5. Step 5: Solve for x
    x = 142,087,959,163.62/422,529
  6. Step 6: Final answer
    x = 336,279.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.