Home / 1,380,794.12-1,905,039.24-807,428.42

Finding the Fourth Proportional to 1,380,794.12, 1,905,039.24 and 807,428.42

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Solution

The fourth proportional to 1,380,794.12, 1,905,039.24 and 807,428.42 is: 1,113,984.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,380,794.12 : 1,905,039.24 = 807,428.42 : x
  2. Step 2: Convert to fraction form
    1,380,794.12/1,905,039.24 = 807,428.42/x
  3. Step 3: Cross multiply
    1,380,794.12x = 1,905,039.24 × 807,428.42
  4. Step 4: Simplify right side
    1,380,794.12x = 1,538,182,823,591.20
  5. Step 5: Solve for x
    x = 1,538,182,823,591.20/1,380,794.12
  6. Step 6: Final answer
    x = 1,113,984.19

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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.