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Finding the Fourth Proportional to 646,220.19, 891,790.51 and 355,858.79

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Solution

The fourth proportional to 646,220.19, 891,790.51 and 355,858.79 is: 491,088.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    646,220.19 : 891,790.51 = 355,858.79 : x
  2. Step 2: Convert to fraction form
    646,220.19/891,790.51 = 355,858.79/x
  3. Step 3: Cross multiply
    646,220.19x = 891,790.51 × 355,858.79
  4. Step 4: Simplify right side
    646,220.19x = 317,351,486,473.48
  5. Step 5: Solve for x
    x = 317,351,486,473.48/646,220.19
  6. Step 6: Final answer
    x = 491,088.78

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