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Finding the Fourth Proportional to 668,443.46, 922,434.68 and 381,963.60

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Solution

The fourth proportional to 668,443.46, 922,434.68 and 381,963.60 is: 527,099.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,443.46 : 922,434.68 = 381,963.60 : x
  2. Step 2: Convert to fraction form
    668,443.46/922,434.68 = 381,963.60/x
  3. Step 3: Cross multiply
    668,443.46x = 922,434.68 × 381,963.60
  4. Step 4: Simplify right side
    668,443.46x = 352,336,472,092.56
  5. Step 5: Solve for x
    x = 352,336,472,092.56/668,443.46
  6. Step 6: Final answer
    x = 527,099.89

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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.