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Finding the Fourth Proportional to 638,296.78, 880,838.64 and 351,843.52

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Solution

The fourth proportional to 638,296.78, 880,838.64 and 351,843.52 is: 485,538.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,296.78 : 880,838.64 = 351,843.52 : x
  2. Step 2: Convert to fraction form
    638,296.78/880,838.64 = 351,843.52/x
  3. Step 3: Cross multiply
    638,296.78x = 880,838.64 × 351,843.52
  4. Step 4: Simplify right side
    638,296.78x = 309,917,367,649.61
  5. Step 5: Solve for x
    x = 309,917,367,649.61/638,296.78
  6. Step 6: Final answer
    x = 485,538.04

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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.