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Finding the Fourth Proportional to 639,633, 882,771.30 and 371,361

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Solution

The fourth proportional to 639,633, 882,771.30 and 371,361 is: 512,523.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,633 : 882,771.30 = 371,361 : x
  2. Step 2: Convert to fraction form
    639,633/882,771.30 = 371,361/x
  3. Step 3: Cross multiply
    639,633x = 882,771.30 × 371,361
  4. Step 4: Simplify right side
    639,633x = 327,826,832,739.30
  5. Step 5: Solve for x
    x = 327,826,832,739.30/639,633
  6. Step 6: Final answer
    x = 512,523.33

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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.