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Finding the Fourth Proportional to 279,578.79, 419,066.56 and 137,258.55

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Solution

The fourth proportional to 279,578.79, 419,066.56 and 137,258.55 is: 205,739.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,578.79 : 419,066.56 = 137,258.55 : x
  2. Step 2: Convert to fraction form
    279,578.79/419,066.56 = 137,258.55/x
  3. Step 3: Cross multiply
    279,578.79x = 419,066.56 × 137,258.55
  4. Step 4: Simplify right side
    279,578.79x = 57,520,468,550.66
  5. Step 5: Solve for x
    x = 57,520,468,550.66/279,578.79
  6. Step 6: Final answer
    x = 205,739.74

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.