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Finding the Fourth Proportional to 627,034.72, 865,278.96 and 355,104.57

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Solution

The fourth proportional to 627,034.72, 865,278.96 and 355,104.57 is: 490,027.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,034.72 : 865,278.96 = 355,104.57 : x
  2. Step 2: Convert to fraction form
    627,034.72/865,278.96 = 355,104.57/x
  3. Step 3: Cross multiply
    627,034.72x = 865,278.96 × 355,104.57
  4. Step 4: Simplify right side
    627,034.72x = 307,264,513,020.85
  5. Step 5: Solve for x
    x = 307,264,513,020.85/627,034.72
  6. Step 6: Final answer
    x = 490,027.91

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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.