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Finding the Fourth Proportional to 627,369.82, 865,768.89 and 355,437.16

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Solution

The fourth proportional to 627,369.82, 865,768.89 and 355,437.16 is: 490,502.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,369.82 : 865,768.89 = 355,437.16 : x
  2. Step 2: Convert to fraction form
    627,369.82/865,768.89 = 355,437.16/x
  3. Step 3: Cross multiply
    627,369.82x = 865,768.89 × 355,437.16
  4. Step 4: Simplify right side
    627,369.82x = 307,726,436,309.49
  5. Step 5: Solve for x
    x = 307,726,436,309.49/627,369.82
  6. Step 6: Final answer
    x = 490,502.45

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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.