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Finding the Fourth Proportional to 627,003.86, 865,318.68 and 355,120.12

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Solution

The fourth proportional to 627,003.86, 865,318.68 and 355,120.12 is: 490,095.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,003.86 : 865,318.68 = 355,120.12 : x
  2. Step 2: Convert to fraction form
    627,003.86/865,318.68 = 355,120.12/x
  3. Step 3: Cross multiply
    627,003.86x = 865,318.68 × 355,120.12
  4. Step 4: Simplify right side
    627,003.86x = 307,292,071,316.55
  5. Step 5: Solve for x
    x = 307,292,071,316.55/627,003.86
  6. Step 6: Final answer
    x = 490,095.98

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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.