Home / 745,491.90-1,028,790.54-405,959.88

Finding the Fourth Proportional to 745,491.90, 1,028,790.54 and 405,959.88

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Solution

The fourth proportional to 745,491.90, 1,028,790.54 and 405,959.88 is: 560,231.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    745,491.90 : 1,028,790.54 = 405,959.88 : x
  2. Step 2: Convert to fraction form
    745,491.90/1,028,790.54 = 405,959.88/x
  3. Step 3: Cross multiply
    745,491.90x = 1,028,790.54 × 405,959.88
  4. Step 4: Simplify right side
    745,491.90x = 417,647,684,163.54
  5. Step 5: Solve for x
    x = 417,647,684,163.54/745,491.90
  6. Step 6: Final answer
    x = 560,231.02

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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.