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Finding the Fourth Proportional to 639,455.88, 882,459.94 and 349,082.42

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Solution

The fourth proportional to 639,455.88, 882,459.94 and 349,082.42 is: 481,739.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,455.88 : 882,459.94 = 349,082.42 : x
  2. Step 2: Convert to fraction form
    639,455.88/882,459.94 = 349,082.42/x
  3. Step 3: Cross multiply
    639,455.88x = 882,459.94 × 349,082.42
  4. Step 4: Simplify right side
    639,455.88x = 308,051,251,408.26
  5. Step 5: Solve for x
    x = 308,051,251,408.26/639,455.88
  6. Step 6: Final answer
    x = 481,739.65

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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.