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Finding the Fourth Proportional to 289,884.80, 434,827.20 and 279,387.20

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Solution

The fourth proportional to 289,884.80, 434,827.20 and 279,387.20 is: 419,080.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,884.80 : 434,827.20 = 279,387.20 : x
  2. Step 2: Convert to fraction form
    289,884.80/434,827.20 = 279,387.20/x
  3. Step 3: Cross multiply
    289,884.80x = 434,827.20 × 279,387.20
  4. Step 4: Simplify right side
    289,884.80x = 121,485,153,891.84
  5. Step 5: Solve for x
    x = 121,485,153,891.84/289,884.80
  6. Step 6: Final answer
    x = 419,080.80

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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.