Home / 1,380,690.28-1,905,291.30-768,874.60

Finding the Fourth Proportional to 1,380,690.28, 1,905,291.30 and 768,874.60

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Solution

The fourth proportional to 1,380,690.28, 1,905,291.30 and 768,874.60 is: 1,061,012.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,380,690.28 : 1,905,291.30 = 768,874.60 : x
  2. Step 2: Convert to fraction form
    1,380,690.28/1,905,291.30 = 768,874.60/x
  3. Step 3: Cross multiply
    1,380,690.28x = 1,905,291.30 × 768,874.60
  4. Step 4: Simplify right side
    1,380,690.28x = 1,464,930,086,170.98
  5. Step 5: Solve for x
    x = 1,464,930,086,170.98/1,380,690.28
  6. Step 6: Final answer
    x = 1,061,012.82

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.