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Finding the Fourth Proportional to 639,651.02, 882,732.18 and 353,189.24

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Solution

The fourth proportional to 639,651.02, 882,732.18 and 353,189.24 is: 487,408.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,651.02 : 882,732.18 = 353,189.24 : x
  2. Step 2: Convert to fraction form
    639,651.02/882,732.18 = 353,189.24/x
  3. Step 3: Cross multiply
    639,651.02x = 882,732.18 × 353,189.24
  4. Step 4: Simplify right side
    639,651.02x = 311,771,507,777.74
  5. Step 5: Solve for x
    x = 311,771,507,777.74/639,651.02
  6. Step 6: Final answer
    x = 487,408.76

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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.