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Finding the Fourth Proportional to 627,006.75, 865,322.67 and 355,123

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Solution

The fourth proportional to 627,006.75, 865,322.67 and 355,123 is: 490,099.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,006.75 : 865,322.67 = 355,123 : x
  2. Step 2: Convert to fraction form
    627,006.75/865,322.67 = 355,123/x
  3. Step 3: Cross multiply
    627,006.75x = 865,322.67 × 355,123
  4. Step 4: Simplify right side
    627,006.75x = 307,295,982,538.41
  5. Step 5: Solve for x
    x = 307,295,982,538.41/627,006.75
  6. Step 6: Final answer
    x = 490,099.96

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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.