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Finding the Fourth Proportional to 368,906.29, 508,018.71 and 320,486.11

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Solution

The fourth proportional to 368,906.29, 508,018.71 and 320,486.11 is: 441,339.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,906.29 : 508,018.71 = 320,486.11 : x
  2. Step 2: Convert to fraction form
    368,906.29/508,018.71 = 320,486.11/x
  3. Step 3: Cross multiply
    368,906.29x = 508,018.71 × 320,486.11
  4. Step 4: Simplify right side
    368,906.29x = 162,812,940,175.12
  5. Step 5: Solve for x
    x = 162,812,940,175.12/368,906.29
  6. Step 6: Final answer
    x = 441,339.56

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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.