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Finding the Fourth Proportional to 1,182,311.89, 1,766,989.49 and 863,135.89

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Solution

The fourth proportional to 1,182,311.89, 1,766,989.49 and 863,135.89 is: 1,289,974.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,182,311.89 : 1,766,989.49 = 863,135.89 : x
  2. Step 2: Convert to fraction form
    1,182,311.89/1,766,989.49 = 863,135.89/x
  3. Step 3: Cross multiply
    1,182,311.89x = 1,766,989.49 × 863,135.89
  4. Step 4: Simplify right side
    1,182,311.89x = 1,525,152,043,812.16
  5. Step 5: Solve for x
    x = 1,525,152,043,812.16/1,182,311.89
  6. Step 6: Final answer
    x = 1,289,974.38

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.