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Finding the Fourth Proportional to 892,365.80, 1,338,548.70 and 853,658.60

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Solution

The fourth proportional to 892,365.80, 1,338,548.70 and 853,658.60 is: 1,280,487.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    892,365.80 : 1,338,548.70 = 853,658.60 : x
  2. Step 2: Convert to fraction form
    892,365.80/1,338,548.70 = 853,658.60/x
  3. Step 3: Cross multiply
    892,365.80x = 1,338,548.70 × 853,658.60
  4. Step 4: Simplify right side
    892,365.80x = 1,142,663,609,273.82
  5. Step 5: Solve for x
    x = 1,142,663,609,273.82/892,365.80
  6. Step 6: Final answer
    x = 1,280,487.90

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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.