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Finding the Fourth Proportional to 280,313.30, 419,485.80 and 191,739.80

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Solution

The fourth proportional to 280,313.30, 419,485.80 and 191,739.80 is: 286,936.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,313.30 : 419,485.80 = 191,739.80 : x
  2. Step 2: Convert to fraction form
    280,313.30/419,485.80 = 191,739.80/x
  3. Step 3: Cross multiply
    280,313.30x = 419,485.80 × 191,739.80
  4. Step 4: Simplify right side
    280,313.30x = 80,432,123,394.84
  5. Step 5: Solve for x
    x = 80,432,123,394.84/280,313.30
  6. Step 6: Final answer
    x = 286,936.52

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1.5x scale

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.