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Finding the Fourth Proportional to 627,402.21, 865,812.04 and 355,469.59

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Solution

The fourth proportional to 627,402.21, 865,812.04 and 355,469.59 is: 490,546.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,402.21 : 865,812.04 = 355,469.59 : x
  2. Step 2: Convert to fraction form
    627,402.21/865,812.04 = 355,469.59/x
  3. Step 3: Cross multiply
    627,402.21x = 865,812.04 × 355,469.59
  4. Step 4: Simplify right side
    627,402.21x = 307,769,850,875.86
  5. Step 5: Solve for x
    x = 307,769,850,875.86/627,402.21
  6. Step 6: Final answer
    x = 490,546.33

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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.