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Finding the Fourth Proportional to 639,606.98, 882,651.94 and 353,120.92

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Solution

The fourth proportional to 639,606.98, 882,651.94 and 353,120.92 is: 487,303.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,606.98 : 882,651.94 = 353,120.92 : x
  2. Step 2: Convert to fraction form
    639,606.98/882,651.94 = 353,120.92/x
  3. Step 3: Cross multiply
    639,606.98x = 882,651.94 × 353,120.92
  4. Step 4: Simplify right side
    639,606.98x = 311,682,862,003.15
  5. Step 5: Solve for x
    x = 311,682,862,003.15/639,606.98
  6. Step 6: Final answer
    x = 487,303.72

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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.