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Finding the Fourth Proportional to 639,477.44, 882,474 and 352,997.72

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Solution

The fourth proportional to 639,477.44, 882,474 and 352,997.72 is: 487,134.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,477.44 : 882,474 = 352,997.72 : x
  2. Step 2: Convert to fraction form
    639,477.44/882,474 = 352,997.72/x
  3. Step 3: Cross multiply
    639,477.44x = 882,474 × 352,997.72
  4. Step 4: Simplify right side
    639,477.44x = 311,511,309,959.28
  5. Step 5: Solve for x
    x = 311,511,309,959.28/639,477.44
  6. Step 6: Final answer
    x = 487,134.17

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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.