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Finding the Fourth Proportional to 505,422.60, 697,472.82 and 275,986.86

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Solution

The fourth proportional to 505,422.60, 697,472.82 and 275,986.86 is: 380,856.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,422.60 : 697,472.82 = 275,986.86 : x
  2. Step 2: Convert to fraction form
    505,422.60/697,472.82 = 275,986.86/x
  3. Step 3: Cross multiply
    505,422.60x = 697,472.82 × 275,986.86
  4. Step 4: Simplify right side
    505,422.60x = 192,493,333,527.15
  5. Step 5: Solve for x
    x = 192,493,333,527.15/505,422.60
  6. Step 6: Final answer
    x = 380,856.21

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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.