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Finding the Fourth Proportional to 892,361.80, 1,338,542.70 and 853,654.60

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Solution

The fourth proportional to 892,361.80, 1,338,542.70 and 853,654.60 is: 1,280,481.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    892,361.80 : 1,338,542.70 = 853,654.60 : x
  2. Step 2: Convert to fraction form
    892,361.80/1,338,542.70 = 853,654.60/x
  3. Step 3: Cross multiply
    892,361.80x = 1,338,542.70 × 853,654.60
  4. Step 4: Simplify right side
    892,361.80x = 1,142,653,133,151.42
  5. Step 5: Solve for x
    x = 1,142,653,133,151.42/892,361.80
  6. Step 6: Final answer
    x = 1,280,481.90

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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.