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Finding the Fourth Proportional to 521,379.09, 782,364.24 and 281,489.76

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Solution

The fourth proportional to 521,379.09, 782,364.24 and 281,489.76 is: 422,394.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,379.09 : 782,364.24 = 281,489.76 : x
  2. Step 2: Convert to fraction form
    521,379.09/782,364.24 = 281,489.76/x
  3. Step 3: Cross multiply
    521,379.09x = 782,364.24 × 281,489.76
  4. Step 4: Simplify right side
    521,379.09x = 220,227,522,150.18
  5. Step 5: Solve for x
    x = 220,227,522,150.18/521,379.09
  6. Step 6: Final answer
    x = 422,394.24

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1.5x scale

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.