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Finding the Fourth Proportional to 1,380,486.57, 1,905,053.28 and 799,788.87

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Solution

The fourth proportional to 1,380,486.57, 1,905,053.28 and 799,788.87 is: 1,103,698.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,380,486.57 : 1,905,053.28 = 799,788.87 : x
  2. Step 2: Convert to fraction form
    1,380,486.57/1,905,053.28 = 799,788.87/x
  3. Step 3: Cross multiply
    1,380,486.57x = 1,905,053.28 × 799,788.87
  4. Step 4: Simplify right side
    1,380,486.57x = 1,523,640,410,100.99
  5. Step 5: Solve for x
    x = 1,523,640,410,100.99/1,380,486.57
  6. Step 6: Final answer
    x = 1,103,698.10

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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.