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Finding the Fourth Proportional to 431,385.40, 646,592.10 and 206,853.40

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Solution

The fourth proportional to 431,385.40, 646,592.10 and 206,853.40 is: 310,047.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,385.40 : 646,592.10 = 206,853.40 : x
  2. Step 2: Convert to fraction form
    431,385.40/646,592.10 = 206,853.40/x
  3. Step 3: Cross multiply
    431,385.40x = 646,592.10 × 206,853.40
  4. Step 4: Simplify right side
    431,385.40x = 133,749,774,298.14
  5. Step 5: Solve for x
    x = 133,749,774,298.14/431,385.40
  6. Step 6: Final answer
    x = 310,047.06

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