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Finding the Fourth Proportional to 279,870.49, 419,847.45 and 90,268.52

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Solution

The fourth proportional to 279,870.49, 419,847.45 and 90,268.52 is: 135,416.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,870.49 : 419,847.45 = 90,268.52 : x
  2. Step 2: Convert to fraction form
    279,870.49/419,847.45 = 90,268.52/x
  3. Step 3: Cross multiply
    279,870.49x = 419,847.45 × 90,268.52
  4. Step 4: Simplify right side
    279,870.49x = 37,899,007,485.93
  5. Step 5: Solve for x
    x = 37,899,007,485.93/279,870.49
  6. Step 6: Final answer
    x = 135,416.24

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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.