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Finding the Fourth Proportional to 1,375,829.78, 1,898,581.63 and 764,021.62

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Solution

The fourth proportional to 1,375,829.78, 1,898,581.63 and 764,021.62 is: 1,054,314.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,375,829.78 : 1,898,581.63 = 764,021.62 : x
  2. Step 2: Convert to fraction form
    1,375,829.78/1,898,581.63 = 764,021.62/x
  3. Step 3: Cross multiply
    1,375,829.78x = 1,898,581.63 × 764,021.62
  4. Step 4: Simplify right side
    1,375,829.78x = 1,450,557,403,871.03
  5. Step 5: Solve for x
    x = 1,450,557,403,871.03/1,375,829.78
  6. Step 6: Final answer
    x = 1,054,314.59

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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.