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Finding the Fourth Proportional to 421,366.58, 581,343.43 and 239,949.89

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Solution

The fourth proportional to 421,366.58, 581,343.43 and 239,949.89 is: 331,049.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,366.58 : 581,343.43 = 239,949.89 : x
  2. Step 2: Convert to fraction form
    421,366.58/581,343.43 = 239,949.89/x
  3. Step 3: Cross multiply
    421,366.58x = 581,343.43 × 239,949.89
  4. Step 4: Simplify right side
    421,366.58x = 139,493,292,080.72
  5. Step 5: Solve for x
    x = 139,493,292,080.72/421,366.58
  6. Step 6: Final answer
    x = 331,049.73

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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.