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Finding the Fourth Proportional to 411,260.80, 616,891.20 and 245,372.80

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Solution

The fourth proportional to 411,260.80, 616,891.20 and 245,372.80 is: 368,059.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    411,260.80 : 616,891.20 = 245,372.80 : x
  2. Step 2: Convert to fraction form
    411,260.80/616,891.20 = 245,372.80/x
  3. Step 3: Cross multiply
    411,260.80x = 616,891.20 × 245,372.80
  4. Step 4: Simplify right side
    411,260.80x = 151,368,321,039.36
  5. Step 5: Solve for x
    x = 151,368,321,039.36/411,260.80
  6. Step 6: Final answer
    x = 368,059.20

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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.