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Finding the Fourth Proportional to 764,891.74, 1,055,361.64 and 478,268.38

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Solution

The fourth proportional to 764,891.74, 1,055,361.64 and 478,268.38 is: 659,892.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    764,891.74 : 1,055,361.64 = 478,268.38 : x
  2. Step 2: Convert to fraction form
    764,891.74/1,055,361.64 = 478,268.38/x
  3. Step 3: Cross multiply
    764,891.74x = 1,055,361.64 × 478,268.38
  4. Step 4: Simplify right side
    764,891.74x = 504,746,094,208.79
  5. Step 5: Solve for x
    x = 504,746,094,208.79/764,891.74
  6. Step 6: Final answer
    x = 659,892.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.