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Finding the Fourth Proportional to 892,363.80, 1,338,545.70 and 853,656.60

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Solution

The fourth proportional to 892,363.80, 1,338,545.70 and 853,656.60 is: 1,280,484.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    892,363.80 : 1,338,545.70 = 853,656.60 : x
  2. Step 2: Convert to fraction form
    892,363.80/1,338,545.70 = 853,656.60/x
  3. Step 3: Cross multiply
    892,363.80x = 1,338,545.70 × 853,656.60
  4. Step 4: Simplify right side
    892,363.80x = 1,142,658,371,206.62
  5. Step 5: Solve for x
    x = 1,142,658,371,206.62/892,363.80
  6. Step 6: Final answer
    x = 1,280,484.90

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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.