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Finding the Fourth Proportional to 627,830.40, 866,435.57 and 355,903.58

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Solution

The fourth proportional to 627,830.40, 866,435.57 and 355,903.58 is: 491,163.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,830.40 : 866,435.57 = 355,903.58 : x
  2. Step 2: Convert to fraction form
    627,830.40/866,435.57 = 355,903.58/x
  3. Step 3: Cross multiply
    627,830.40x = 866,435.57 × 355,903.58
  4. Step 4: Simplify right side
    627,830.40x = 308,367,521,202.34
  5. Step 5: Solve for x
    x = 308,367,521,202.34/627,830.40
  6. Step 6: Final answer
    x = 491,163.73

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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.