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Finding the Fourth Proportional to 421,372.53, 581,351.64 and 239,955.83

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Solution

The fourth proportional to 421,372.53, 581,351.64 and 239,955.83 is: 331,057.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,372.53 : 581,351.64 = 239,955.83 : x
  2. Step 2: Convert to fraction form
    421,372.53/581,351.64 = 239,955.83/x
  3. Step 3: Cross multiply
    421,372.53x = 581,351.64 × 239,955.83
  4. Step 4: Simplify right side
    421,372.53x = 139,498,712,391.30
  5. Step 5: Solve for x
    x = 139,498,712,391.30/421,372.53
  6. Step 6: Final answer
    x = 331,057.92

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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.