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Finding the Fourth Proportional to 402,908.31, 556,014.58 and 221,638.82

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Solution

The fourth proportional to 402,908.31, 556,014.58 and 221,638.82 is: 305,862.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,908.31 : 556,014.58 = 221,638.82 : x
  2. Step 2: Convert to fraction form
    402,908.31/556,014.58 = 221,638.82/x
  3. Step 3: Cross multiply
    402,908.31x = 556,014.58 × 221,638.82
  4. Step 4: Simplify right side
    402,908.31x = 123,234,412,079.83
  5. Step 5: Solve for x
    x = 123,234,412,079.83/402,908.31
  6. Step 6: Final answer
    x = 305,862.18

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