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Finding the Fourth Proportional to 421,282.46, 581,373.66 and 239,991.70

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Solution

The fourth proportional to 421,282.46, 581,373.66 and 239,991.70 is: 331,190.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,282.46 : 581,373.66 = 239,991.70 : x
  2. Step 2: Convert to fraction form
    421,282.46/581,373.66 = 239,991.70/x
  3. Step 3: Cross multiply
    421,282.46x = 581,373.66 × 239,991.70
  4. Step 4: Simplify right side
    421,282.46x = 139,524,852,998.62
  5. Step 5: Solve for x
    x = 139,524,852,998.62/421,282.46
  6. Step 6: Final answer
    x = 331,190.75

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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.