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Finding the Fourth Proportional to 639,471.63, 882,471.02 and 352,991.91

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Solution

The fourth proportional to 639,471.63, 882,471.02 and 352,991.91 is: 487,128.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,471.63 : 882,471.02 = 352,991.91 : x
  2. Step 2: Convert to fraction form
    639,471.63/882,471.02 = 352,991.91/x
  3. Step 3: Cross multiply
    639,471.63x = 882,471.02 × 352,991.91
  4. Step 4: Simplify right side
    639,471.63x = 311,505,129,104.49
  5. Step 5: Solve for x
    x = 311,505,129,104.49/639,471.63
  6. Step 6: Final answer
    x = 487,128.93

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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.