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Finding the Fourth Proportional to 485,436.80, 727,809.60 and 185,801.60

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Solution

The fourth proportional to 485,436.80, 727,809.60 and 185,801.60 is: 278,570.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,436.80 : 727,809.60 = 185,801.60 : x
  2. Step 2: Convert to fraction form
    485,436.80/727,809.60 = 185,801.60/x
  3. Step 3: Cross multiply
    485,436.80x = 727,809.60 × 185,801.60
  4. Step 4: Simplify right side
    485,436.80x = 135,228,188,175.36
  5. Step 5: Solve for x
    x = 135,228,188,175.36/485,436.80
  6. Step 6: Final answer
    x = 278,570.12

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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.