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Finding the Fourth Proportional to 279,813.80, 419,720.70 and 236,511.20

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Solution

The fourth proportional to 279,813.80, 419,720.70 and 236,511.20 is: 354,766.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,813.80 : 419,720.70 = 236,511.20 : x
  2. Step 2: Convert to fraction form
    279,813.80/419,720.70 = 236,511.20/x
  3. Step 3: Cross multiply
    279,813.80x = 419,720.70 × 236,511.20
  4. Step 4: Simplify right side
    279,813.80x = 99,268,646,421.84
  5. Step 5: Solve for x
    x = 99,268,646,421.84/279,813.80
  6. Step 6: Final answer
    x = 354,766.80

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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.