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Finding the Fourth Proportional to 371,691.40, 512,978.10 and 220,789

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Solution

The fourth proportional to 371,691.40, 512,978.10 and 220,789 is: 304,714.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,691.40 : 512,978.10 = 220,789 : x
  2. Step 2: Convert to fraction form
    371,691.40/512,978.10 = 220,789/x
  3. Step 3: Cross multiply
    371,691.40x = 512,978.10 × 220,789
  4. Step 4: Simplify right side
    371,691.40x = 113,259,921,720.90
  5. Step 5: Solve for x
    x = 113,259,921,720.90/371,691.40
  6. Step 6: Final answer
    x = 304,714.94

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