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Finding the Fourth Proportional to 639,460.86, 882,452.93 and 352,978.44

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Solution

The fourth proportional to 639,460.86, 882,452.93 and 352,978.44 is: 487,108.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,460.86 : 882,452.93 = 352,978.44 : x
  2. Step 2: Convert to fraction form
    639,460.86/882,452.93 = 352,978.44/x
  3. Step 3: Cross multiply
    639,460.86x = 882,452.93 × 352,978.44
  4. Step 4: Simplify right side
    639,460.86x = 311,486,856,839.94
  5. Step 5: Solve for x
    x = 311,486,856,839.94/639,460.86
  6. Step 6: Final answer
    x = 487,108.56

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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.