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Finding the Fourth Proportional to 421,372.38, 581,489.91 and 230,383.74

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Solution

The fourth proportional to 421,372.38, 581,489.91 and 230,383.74 is: 317,927.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,372.38 : 581,489.91 = 230,383.74 : x
  2. Step 2: Convert to fraction form
    421,372.38/581,489.91 = 230,383.74/x
  3. Step 3: Cross multiply
    421,372.38x = 581,489.91 × 230,383.74
  4. Step 4: Simplify right side
    421,372.38x = 133,965,820,238.06
  5. Step 5: Solve for x
    x = 133,965,820,238.06/421,372.38
  6. Step 6: Final answer
    x = 317,927.39

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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.