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Finding the Fourth Proportional to 419,953.70, 629,930.55 and 412,955.30

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Solution

The fourth proportional to 419,953.70, 629,930.55 and 412,955.30 is: 619,432.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    419,953.70 : 629,930.55 = 412,955.30 : x
  2. Step 2: Convert to fraction form
    419,953.70/629,930.55 = 412,955.30/x
  3. Step 3: Cross multiply
    419,953.70x = 629,930.55 × 412,955.30
  4. Step 4: Simplify right side
    419,953.70x = 260,133,159,254.42
  5. Step 5: Solve for x
    x = 260,133,159,254.42/419,953.70
  6. Step 6: Final answer
    x = 619,432.95

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.