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Finding the Fourth Proportional to 627,388.64, 865,605.12 and 355,412.96

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Solution

The fourth proportional to 627,388.64, 865,605.12 and 355,412.96 is: 490,361.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,388.64 : 865,605.12 = 355,412.96 : x
  2. Step 2: Convert to fraction form
    627,388.64/865,605.12 = 355,412.96/x
  3. Step 3: Cross multiply
    627,388.64x = 865,605.12 × 355,412.96
  4. Step 4: Simplify right side
    627,388.64x = 307,647,277,890.36
  5. Step 5: Solve for x
    x = 307,647,277,890.36/627,388.64
  6. Step 6: Final answer
    x = 490,361.57

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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.