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Finding the Fourth Proportional to 668,622.20, 922,474.23 and 381,939.31

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Solution

The fourth proportional to 668,622.20, 922,474.23 and 381,939.31 is: 526,948.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,622.20 : 922,474.23 = 381,939.31 : x
  2. Step 2: Convert to fraction form
    668,622.20/922,474.23 = 381,939.31/x
  3. Step 3: Cross multiply
    668,622.20x = 922,474.23 × 381,939.31
  4. Step 4: Simplify right side
    668,622.20x = 352,329,166,286.61
  5. Step 5: Solve for x
    x = 352,329,166,286.61/668,622.20
  6. Step 6: Final answer
    x = 526,948.05

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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.