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Finding the Fourth Proportional to 627,392.85, 865,807.61 and 340,912.94

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Solution

The fourth proportional to 627,392.85, 865,807.61 and 340,912.94 is: 470,462.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,392.85 : 865,807.61 = 340,912.94 : x
  2. Step 2: Convert to fraction form
    627,392.85/865,807.61 = 340,912.94/x
  3. Step 3: Cross multiply
    627,392.85x = 865,807.61 × 340,912.94
  4. Step 4: Simplify right side
    627,392.85x = 295,165,011,765.87
  5. Step 5: Solve for x
    x = 295,165,011,765.87/627,392.85
  6. Step 6: Final answer
    x = 470,462.82

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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.