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Finding the Fourth Proportional to 1,207,795.80, 1,811,693.70 and 809,664.60

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Solution

The fourth proportional to 1,207,795.80, 1,811,693.70 and 809,664.60 is: 1,214,496.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,207,795.80 : 1,811,693.70 = 809,664.60 : x
  2. Step 2: Convert to fraction form
    1,207,795.80/1,811,693.70 = 809,664.60/x
  3. Step 3: Cross multiply
    1,207,795.80x = 1,811,693.70 × 809,664.60
  4. Step 4: Simplify right side
    1,207,795.80x = 1,466,864,254,933.02
  5. Step 5: Solve for x
    x = 1,466,864,254,933.02/1,207,795.80
  6. Step 6: Final answer
    x = 1,214,496.90

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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.