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Finding the Fourth Proportional to 821,497.20, 1,230,172.20 and 539,487.60

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Solution

The fourth proportional to 821,497.20, 1,230,172.20 and 539,487.60 is: 807,869.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    821,497.20 : 1,230,172.20 = 539,487.60 : x
  2. Step 2: Convert to fraction form
    821,497.20/1,230,172.20 = 539,487.60/x
  3. Step 3: Cross multiply
    821,497.20x = 1,230,172.20 × 539,487.60
  4. Step 4: Simplify right side
    821,497.20x = 663,662,647,764.72
  5. Step 5: Solve for x
    x = 663,662,647,764.72/821,497.20
  6. Step 6: Final answer
    x = 807,869.64

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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.