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Finding the Fourth Proportional to 627,689.70, 866,226.69 and 355,785.30

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Solution

The fourth proportional to 627,689.70, 866,226.69 and 355,785.30 is: 490,992.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,689.70 : 866,226.69 = 355,785.30 : x
  2. Step 2: Convert to fraction form
    627,689.70/866,226.69 = 355,785.30/x
  3. Step 3: Cross multiply
    627,689.70x = 866,226.69 × 355,785.30
  4. Step 4: Simplify right side
    627,689.70x = 308,190,722,769.66
  5. Step 5: Solve for x
    x = 308,190,722,769.66/627,689.70
  6. Step 6: Final answer
    x = 490,992.16

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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.