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Finding the Fourth Proportional to 656,308.50, 905,706.09 and 354,502.50

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Solution

The fourth proportional to 656,308.50, 905,706.09 and 354,502.50 is: 489,213.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,308.50 : 905,706.09 = 354,502.50 : x
  2. Step 2: Convert to fraction form
    656,308.50/905,706.09 = 354,502.50/x
  3. Step 3: Cross multiply
    656,308.50x = 905,706.09 × 354,502.50
  4. Step 4: Simplify right side
    656,308.50x = 321,075,073,170.23
  5. Step 5: Solve for x
    x = 321,075,073,170.23/656,308.50
  6. Step 6: Final answer
    x = 489,213.64

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