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Finding the Fourth Proportional to 421,157.07, 581,196.87 and 239,885.96

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Solution

The fourth proportional to 421,157.07, 581,196.87 and 239,885.96 is: 331,042.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,157.07 : 581,196.87 = 239,885.96 : x
  2. Step 2: Convert to fraction form
    421,157.07/581,196.87 = 239,885.96/x
  3. Step 3: Cross multiply
    421,157.07x = 581,196.87 × 239,885.96
  4. Step 4: Simplify right side
    421,157.07x = 139,420,966,202.96
  5. Step 5: Solve for x
    x = 139,420,966,202.96/421,157.07
  6. Step 6: Final answer
    x = 331,042.68

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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.