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Finding the Fourth Proportional to 5,321,200.80, 7,981,801.20 and 1,954,970.40

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Solution

The fourth proportional to 5,321,200.80, 7,981,801.20 and 1,954,970.40 is: 2,932,455.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,321,200.80 : 7,981,801.20 = 1,954,970.40 : x
  2. Step 2: Convert to fraction form
    5,321,200.80/7,981,801.20 = 1,954,970.40/x
  3. Step 3: Cross multiply
    5,321,200.80x = 7,981,801.20 × 1,954,970.40
  4. Step 4: Simplify right side
    5,321,200.80x = 15,604,185,084,684.48
  5. Step 5: Solve for x
    x = 15,604,185,084,684.48/5,321,200.80
  6. Step 6: Final answer
    x = 2,932,455.60

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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.