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Finding the Fourth Proportional to 807,200.80, 1,210,801.20 and 681,229.60

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Solution

The fourth proportional to 807,200.80, 1,210,801.20 and 681,229.60 is: 1,021,844.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    807,200.80 : 1,210,801.20 = 681,229.60 : x
  2. Step 2: Convert to fraction form
    807,200.80/1,210,801.20 = 681,229.60/x
  3. Step 3: Cross multiply
    807,200.80x = 1,210,801.20 × 681,229.60
  4. Step 4: Simplify right side
    807,200.80x = 824,833,617,155.52
  5. Step 5: Solve for x
    x = 824,833,617,155.52/807,200.80
  6. Step 6: Final answer
    x = 1,021,844.40

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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.