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Finding the Fourth Proportional to 639,600.42, 882,649.89 and 353,121.06

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Solution

The fourth proportional to 639,600.42, 882,649.89 and 353,121.06 is: 487,307.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,600.42 : 882,649.89 = 353,121.06 : x
  2. Step 2: Convert to fraction form
    639,600.42/882,649.89 = 353,121.06/x
  3. Step 3: Cross multiply
    639,600.42x = 882,649.89 × 353,121.06
  4. Step 4: Simplify right side
    639,600.42x = 311,682,264,765.68
  5. Step 5: Solve for x
    x = 311,682,264,765.68/639,600.42
  6. Step 6: Final answer
    x = 487,307.79

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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.