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Finding the Fourth Proportional to 422,911.80, 583,645.26 and 279,420.12

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Solution

The fourth proportional to 422,911.80, 583,645.26 and 279,420.12 is: 385,617.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    422,911.80 : 583,645.26 = 279,420.12 : x
  2. Step 2: Convert to fraction form
    422,911.80/583,645.26 = 279,420.12/x
  3. Step 3: Cross multiply
    422,911.80x = 583,645.26 × 279,420.12
  4. Step 4: Simplify right side
    422,911.80x = 163,082,228,586.63
  5. Step 5: Solve for x
    x = 163,082,228,586.63/422,911.80
  6. Step 6: Final answer
    x = 385,617.59

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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.