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Finding the Fourth Proportional to 421,372.73, 581,351.90 and 239,956.01

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Solution

The fourth proportional to 421,372.73, 581,351.90 and 239,956.01 is: 331,058.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,372.73 : 581,351.90 = 239,956.01 : x
  2. Step 2: Convert to fraction form
    421,372.73/581,351.90 = 239,956.01/x
  3. Step 3: Cross multiply
    421,372.73x = 581,351.90 × 239,956.01
  4. Step 4: Simplify right side
    421,372.73x = 139,498,884,383.19
  5. Step 5: Solve for x
    x = 139,498,884,383.19/421,372.73
  6. Step 6: Final answer
    x = 331,058.17

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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.