Home / 745,491.40-1,028,789.85-405,959.38

Finding the Fourth Proportional to 745,491.40, 1,028,789.85 and 405,959.38

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Solution

The fourth proportional to 745,491.40, 1,028,789.85 and 405,959.38 is: 560,230.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    745,491.40 : 1,028,789.85 = 405,959.38 : x
  2. Step 2: Convert to fraction form
    745,491.40/1,028,789.85 = 405,959.38/x
  3. Step 3: Cross multiply
    745,491.40x = 1,028,789.85 × 405,959.38
  4. Step 4: Simplify right side
    745,491.40x = 417,646,889,656.29
  5. Step 5: Solve for x
    x = 417,646,889,656.29/745,491.40
  6. Step 6: Final answer
    x = 560,230.33

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1.5x scale

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.