Home / 1,391,915-2,086,379.94-911,961.56

Finding the Fourth Proportional to 1,391,915, 2,086,379.94 and 911,961.56

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Solution

The fourth proportional to 1,391,915, 2,086,379.94 and 911,961.56 is: 1,366,964.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,391,915 : 2,086,379.94 = 911,961.56 : x
  2. Step 2: Convert to fraction form
    1,391,915/2,086,379.94 = 911,961.56/x
  3. Step 3: Cross multiply
    1,391,915x = 2,086,379.94 × 911,961.56
  4. Step 4: Simplify right side
    1,391,915x = 1,902,698,304,835.11
  5. Step 5: Solve for x
    x = 1,902,698,304,835.11/1,391,915
  6. Step 6: Final answer
    x = 1,366,964.44

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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.