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Finding the Fourth Proportional to 639,310.52, 882,362.92 and 381,204.12

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Solution

The fourth proportional to 639,310.52, 882,362.92 and 381,204.12 is: 526,129.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,310.52 : 882,362.92 = 381,204.12 : x
  2. Step 2: Convert to fraction form
    639,310.52/882,362.92 = 381,204.12/x
  3. Step 3: Cross multiply
    639,310.52x = 882,362.92 × 381,204.12
  4. Step 4: Simplify right side
    639,310.52x = 336,360,383,509.84
  5. Step 5: Solve for x
    x = 336,360,383,509.84/639,310.52
  6. Step 6: Final answer
    x = 526,129.90

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1.5x scale

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.