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Finding the Fourth Proportional to 619,129.40, 927,138.90 and 407,622.20

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Solution

The fourth proportional to 619,129.40, 927,138.90 and 407,622.20 is: 610,409.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,129.40 : 927,138.90 = 407,622.20 : x
  2. Step 2: Convert to fraction form
    619,129.40/927,138.90 = 407,622.20/x
  3. Step 3: Cross multiply
    619,129.40x = 927,138.90 × 407,622.20
  4. Step 4: Simplify right side
    619,129.40x = 377,922,398,123.58
  5. Step 5: Solve for x
    x = 377,922,398,123.58/619,129.40
  6. Step 6: Final answer
    x = 610,409.39

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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.