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Finding the Fourth Proportional to 354,313.60, 531,613.76 and 143,896.96

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Solution

The fourth proportional to 354,313.60, 531,613.76 and 143,896.96 is: 215,903.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,313.60 : 531,613.76 = 143,896.96 : x
  2. Step 2: Convert to fraction form
    354,313.60/531,613.76 = 143,896.96/x
  3. Step 3: Cross multiply
    354,313.60x = 531,613.76 × 143,896.96
  4. Step 4: Simplify right side
    354,313.60x = 76,497,603,958.17
  5. Step 5: Solve for x
    x = 76,497,603,958.17/354,313.60
  6. Step 6: Final answer
    x = 215,903.66

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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.